[seqfan] A simple looking sequence is spontaneously breaking its monotony
Thomas Scheuerle
ts181 at mail.ru
Tue Oct 26 08:59:47 CEST 2021
Hi,
An example how easy looking patterns are dangerous ..
Some day in the future I will try to submit this sequence:
1, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9 ...
Without knowing its definition it looks a lot like floor(some function of n).
Its definition:
Split n into a sum n = k1+k2+..km such that a(n) = A001055(k1)+...A001055(km) becomes maximal.
A001055(km) is the number of ways of factoring km with all factors greater than 1.
There are yet two cases known to me where
a(n+1) < a(n) this is at n = 52 and 76.
There may be several sums for each n, which reach a(n), but some examples of the lexicographically earliest are found here:
n = k1+k2+..+km A001055(k1)+...A001055(km) = a(n) n's for prefixes in the sum
--------------------------------------------------------------------------------------------------------
1 = 1 1 = 1
2 = 2 1 = 1
3 = 1+2 1+1 = 2 1
4 = 1+3 1+1 = 2 1
5 = 1+4 1+2 = 3 1
6 = 1+2+3 1+1+1 = 3 1;3
7 = 1+2+4 1+1+1 = 4 1;3
8 = 1+3+4 1+1+2 = 4 1;4
9 = 2+3+4 1+1+2 = 4 2
10 = 1+2+3+4 1+1+1+2 = 5 1;3;6
11 = 1+4+6 1+2+2 = 5 1;5
12 = 1+2+4+5 1+1+2+1 = 5 1;3;7
13 = 1+2+4+6 1+1+2+2 = 6 1;3;7
14 = 1+3+4+6 1+1+2+2 = 6 1;4;8
15 = 1+2+4+8 1+1+2+3 = 7 1;3;7;
16 = 1+2+3+4+6 1+1+1+2+2 = 7 1;3;6;10
17 = 2+3+4+8 1+1+2+3 = 7 2;9
18 = 1+2+3+4+8 1+1+1+2+3 = 8 1;3;6;10
19 = 1+4+6+8 1+2+2+3 = 8 1;5;11
20 = 1+2+4+5+8 1+1+2+1+3 = 8 1;3;7;12
21 = 1+2+4+6+8 1+1+2+2+3 = 9 1;3;7;13
22 = 1+3+4+6+8 1+1+2+2+3 = 9 1;4;8;14
23 = 1+2+3+4+5+8 1+1+1+2+1+3 = 9 1;3;6;10
......
kindest regards
Thomas Scheuerle
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