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%I #3 Mar 20 2019 20:14:33
%S 1,5,29,196,1519,13293,129681,1395504,16420458,209724450,2889435185,
%T 42711906510,674273776409,11321518590991,201460954569411,
%U 3787078288117632,74989404135333176,1560115234974759624,34021998346437480754,776044059807136053020,18479631810762197072198,458571995526115351079650,11839067860288617013759941,317516454727719391340475084,8833750915068037494754203780,254617921422661239086243462460,7594011177768010264119760374795
%N a(n) is the coefficient of y^n in Product_{k=0..n} (1 + (k+2)*y + y^2), for n >= 0.
%C a(n) = A324960(n+1,n) for n >= 0.
%o (PARI) {a(n) = polcoeff( prod(m=0, n, 1 + (m+2)*y + y^2 +y*O(y^n)), n, y)}
%o for(n=0, 30, print1(a(n), ", "))
%Y Cf. A324960, A324961.
%K nonn
%O 0,2
%A _Paul D. Hanna_, Mar 20 2019
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