[seqfan] Re: A004143 From the powers that be

Don Reble djr at nk.ca
Tue Dec 22 02:49:52 CET 2015


> The sequence of values that I get is,
> 0, 1, 2, 5, 10, 40, 40, 105, 5627, 14501, 330861, 658110, 897229.

> a(8) = 105 rather than the 106 given in the OEIS and in Eggleton...
> My chain of powers for this case runs:
> 2^105 > 3^66 > 5^45 > 7^37 > 11^30 > 13^28 > 17^25 > 19^24,

> I would quite like an independent verification...

    Ok.

 2: 1 0
 3: 2 1 0
 4: 5 3 2 1
 5: 10 6 4 3 2
 6: 40 25 17 14 11 10
 7: 40 25 17 14 11 10 9
 8: 105 66 45 37 30 28 25 24
 9: 5627 3550 2423 2004 1626 1520 1376 1324 1243
10: 14501 9149 6245 5165 4191 3918 3547 3413 3205 2984
11: 330861 208750 142494 117855 95640 89411 80945 77887 73141 68106
    66783
12: 658110 415221 283432 234423 190236 177846 161006 154924 145484
    135469 132838 126329
13: 897229 566088 386415 319599 259357 242465 219507 211215 198345
    184691 181104 172230 167469


---

    Today's puzzle: what's this,
        1 5 13 15 67 389 389 19805 19805 269693 1558103
    and why are all the terms odd?


-- 
Don Reble  djr at nk.ca



More information about the SeqFan mailing list