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%I #7 Mar 08 2024 12:09:24
%S 1,1,7,81,1299,26565,659655,19256265,645765435,24453391725,
%T 1031685317775,47978413923825,2437962646702275,134374287343821525,
%U 7984095179348863575,508687013361879977625,34593307096333435324875,2500919993138258679112125,191526329081848509391017375
%N a(n) = Sum_{k=1..n} binomial(n, k) * Pochhammer(1/4, k) * 4^k * a(n - k) for n > 0 and a(0) = 1. Row sums of triangle A371026.
%p a := proc(n) option remember; local k; if n = 0 then 1 else
%p add(binomial(n, k) * pochhammer(1/4, k) * 4^k * a(n - k), k = 1..n) fi end:
%p seq(a(n), n = 0..19);
%Y Cf. A371026, A007696.
%K nonn
%O 0,3
%A _Peter Luschny_, Mar 08 2024