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a(n) = A369134(n, 2).
2

%I #6 Jan 14 2024 08:58:02

%S 0,0,-1,7,-14,693,-30030,4150146,-21441420,3508377873,-425496301230,

%T 163608770318994,-381271515244620,263655717130655850,

%U -20916990073196036820,28579221265797444862620,-20735968190374168899967800,535753174085515196009964765,-2008476391973175078407803350

%N a(n) = A369134(n, 2).

%Y Cf. A369134, A369121.

%K sign

%O 0,4

%A _Peter Luschny_, Jan 14 2024