0,3

Second column of A139377. Row sums of A139377 give a(n+1).

G.f.: xc(x)/(1-x-2x^2), c(x) the g.f. of A000108; a(n)=sum{k=0..n, A000108(k)*A001045(n-k)};

Sequence in context: A004664 A074446 A121328 this_sequence A065178 A148438 A148439

Adjacent sequences: A139376 A139377 A139378 this_sequence A139380 A139381 A139382

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Apr 15 2008