login
Second column (m=2) of triangle S2p(-2) = A004747.
2

%I #7 Jul 04 2023 08:18:10

%S 1,6,52,600,8680,151200,3082240,71998080,1896294400,55601145600,

%T 1796277683200,63397990656000,2427084884224000,100175046107136000,

%U 4434284662872064000,209554432423784448000,10530302071553904640000,560682451860226375680000

%N Second column (m=2) of triangle S2p(-2) = A004747.

%F a(n) = A004747(n+2,2), n>=0.

%Y Cf. A004747, A008544(n-1) (m=1 column), A144346 (m=3 column).

%K nonn,easy

%O 0,2

%A _Wolfdieter Lang_, Oct 09 2008