# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a320245 Showing 1-1 of 1 %I A320245 #5 Oct 08 2018 09:19:39 %S A320245 1,1,4,6,17,25,59,89,187,284,545,828,1505,2270,3930,5904,9861,14695, %T A320245 23827,35248,55775,81882,126874,184870,281467,407065,610193,876282, %U A320245 1295892,1848144,2700398,3825912,5530337,7786022,11145541,15597196,22131170,30792303 %N A320245 G.f.: Product_{k>=1, j>=1} 1/((1 + x^(k*j)) * (1 - x^(k*j))^2). %C A320245 Convolution of A288007 and A320236. %H A320245 Vaclav Kotesovec, Table of n, a(n) for n = 0..10000 %t A320245 nmax = 50; CoefficientList[Series[Product[1/((1+x^(k*j))*(1-x^(k*j))^2), {k, 1, nmax}, {j, 1, Floor[nmax/k]+1}], {x, 0, nmax}], x] %Y A320245 Cf. A158441, A320236, A320238. %K A320245 nonn %O A320245 0,3 %A A320245 _Vaclav Kotesovec_, Oct 08 2018 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE