A349974 - OEIS

%I #8 Dec 13 2021 02:45:43

%S 0,1,5,17,53,147,389,981,2401,5697,13293,30423,68745,153403,339195,

%T 743169,1617857,3497875,7523697,16102889,34324847,72875031,154233691,

%U 325388121,684664081,1436991619,3009410483,6289146455,13119434889,27319198507,56799400255,117916622547

%N a(n) = 1 + Sum_{k=0..n} (2*k - 1)*A349976(n, k).

%Y Cf. A349976, A349973.

%K nonn

%O 0,3

%A _Peter Luschny_, Dec 10 2021, following a suggestion from _Alois P. Heinz_.