# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/

Search: id:a160646
Showing 1-1 of 1

%I A160646 #7 Mar 31 2012 13:23:39
%S A160646 0,1,1,1,3,3,4,8,10,13,22,28,39,58,77,104,148,197,265,363,481,638,858,
%T A160646 1126,1480,1953,2544,3309,4312,5566,7175,9246,11843,15136,19328,24564,
%U A160646 31158,39466,49811,62737,78900,98931,123817,154707,192830,239911,298013
%N A160646 First differences of A160644.
%C A160646 Second differences count a subset of unrestricted partitions; cf. A160648.
%H A160646 Nathaniel Johnston, <a href="/A160646/b160646.txt">Table of n, a(n) for n = 1..2500</a>
%e A160646 A160644 begins 1, 1, 2, 3, 4, 7, 10, 14, 22, 32, 45, 67, 95, 134, 192, ... so a(n) begins 0, 1, 1, 1, 3, 3, 4, 8, 10, 13, 22, 28, 39, 58, ...
%Y A160646 Cf. A000041, A002685, A053445, A160644, A160648.
%K A160646 easy,nonn
%O A160646 1,5
%A A160646 _Alford Arnold_, May 24 2009

# Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE