[seqfan] A151995: non-monotonic(?!)
zak seidov
zakseidov at yahoo.com
Thu Oct 8 19:15:28 CEST 2009
a(4)>a(5):
250488>19986.
Correct monotonic list is:
1, 2, 6, 250488, 279786, 1060566, 1414088, 1767610, 2447460, 10031652, 10356624, 50373066, 155962698
while list in %S A151995
1,2,6,250488,19986,118030,133970,...
actually answers the Q by Neil:
%C A151995 What happens if we relax the requirement that a(n) > a(n-1), and only require that a(n) be positive and not already in the sequence?)
or I'm terribly missing something,
Zak
%I A151995
%S A151995 1,2,6,250488,19986,118030,133970,693810,2231328,3407286,5733260,
%T A151995 25176334,75529002,1913932644
%N A151995 a(1)=1; thereafter a(n) is smallest number > a(n-1) such that the sum a(1)+...+a(n) divides the concatenation a(1)...a(n).
%C A151995 What happens if we relax the requirement that a(n) > a(n-1), and only require that a(n) be positive and not already in the sequence?
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