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Second column (m=2) of triangle S2hat(-3) = A144280.
2

%I #5 Jul 03 2023 14:52:43

%S 1,3,30,294,4599,81081,1837836,47609100,1449052605,49597258095,

%T 1908702935370,81045039516210,3775424041048275,191061229964098725,

%U 10445176764205306200,613084928455370309400,38459158233446064893625,2567221442902306374982875

%N Second column (m=2) of triangle S2hat(-3) = A144280.

%F a(n) = A144280(n+2,2), n>=0.

%Y Cf. A144280, A008545 (m=1 column), A144283 (m-3 column).

%K nonn,easy

%O 0,2

%A _Wolfdieter Lang_, Oct 09 2008