# [seqfan] Re: Conways 5th problem solved

Vladimir Shevelev shevelev at bgu.ac.il
Sun Oct 12 15:46:10 CEST 2014

```Dear Bob,

I wonder what is a current lower estimate for the maximal
element of tragectory of 49  in the algorithm of A037274?
>From your table it is similar that it is much more than A037274(65).

P.S. In addition to A037274 I submitted a simpler A248705.

Regards,

________________________________________
From: SeqFan [seqfan-bounces at list.seqfan.eu] on behalf of Robert G. Wilson v [rgwv at rgwv.com]
Sent: 12 October 2014 08:13
To: 'Sequence Fanatics Discussion list'
Subject: [seqfan] Re: Conways 5th problem solved

Neil,

Here are the terms I am getting. So far the only one I am missing is 49.

Bob.

1  1
2  2
3  3
4  211
5  5
6  23
7  7
8  3331113965338635107
9  311
10  773
11  11
12  223
13  13
14  13367
15  1129
16  31636373
17  17
18  233
19  19
20  3318308475676071413
21  37
22  211
23  23
24  331319
25  773
26  3251
27  13367
28  227
29  29
30  547
31  31
32  241271
33  311
34  31397
35  1129
36  71129
37  37
38  373
39  313
40  3314192745739
41  41
42  379
43  43
44  22815088913
45  3411949
46  223
47  47
48  6161791591356884791277
49  Unknown
50  3517
51  317
52  2213
53  53
54  2333
55  773
56  37463
57  1129
58  229
59  59
60  35149
61  61
62  31237
63  337
64  1272505013723
65  1381321118321175157763339900357651
66  2311
67  67
68  3739
69  33191
70  257
71  71
72  1119179
73  73
74  379
75  571
76  333271

-----Original Message-----
From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Neil Sloane
Sent: Saturday, October 11, 2014 10:21 PM
To: Sequence Fanatics Discussion list
Subject: [seqfan] Conways 5th problem solved

Dear Seqfans, At the OEIS-50 Fest yesterday, John Conway offered \$1000 for the 20th term of A037274 (well, he didn't phrase the question in exactly those words). The answer of course is a(20) = 3318308475676071413

(He meant to say a(67), I believe, but he neglected to check the OEIS before posing the question.)

Neil
--
Dear Friends, I have now retired from AT&T. New coordinates:

Neil J. A. Sloane, President, OEIS Foundation
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Phone: 732 828 6098; home page: http://NeilSloane.com
Email: njasloane at gmail.com

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```