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%I #14 Nov 27 2015 00:18:58
%S 1,3,6,11,15,20,26,30,34,38,46,50,54,59,67,74,81,88,95,103,108,114,
%T 120,128,138,145,153,160,167,172,177,183,189,197,203,210,217,224,228,
%U 233,238,244,250,258,265,270,275,281,288,299,304,308,313,321,333,340,349,354,362,370,379,389,403
%N a(n) = number of nonnegative integers k for which A155043(k) <= n; partial sums of A262507.
%H Antti Karttunen, <a href="/A263260/b263260.txt">Table of n, a(n) for n = 0..10000</a>
%F a(0) = 1; for n >= 1, a(n) = A262507(n) + a(n-1).
%o (Scheme, with memoization-macro definec)
%o (definec (A263260 n) (if (zero? n) (A262507 n) (+ (A262507 n) (A263260 (- n 1)))))
%Y Cf. A000005, A049820, A155043, A262507, A263265, A263270.
%K nonn
%O 0,2
%A _Antti Karttunen_, Nov 24 2015
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