A144273 - OEIS

%I #6 Jul 02 2023 06:07:17

%S 1,1,4,19,132,1119,12057,151560,2234970,37355130,702161460,

%T 14608747440,333760916475,8297318063475,223043540630400,

%U 6444290305953675,199158606533605950,6554872218153191625,228899544451085017125,8452452568601816775000,329069272855540304587500

%N Third column (m=3) of triangle S2hat(-1) = A144270.

%F a(n) = A144270(n+3,3), n>=0.

%Y Cf. A144270, A144272 (column m=2).

%K nonn,easy

%O 0,3

%A _Wolfdieter Lang_, Oct 09 2008