A004150 Euler numbers written backwards.

1, 1, 1, 2, 5, 61, 16, 272, 5831, 6397, 12505, 297353, 5672072, 65286322, 189063991, 2137573091, 54121519391, 679243568902, 1445769784042, 23821158888092, 525732881173073, 6904213508941594, 10973139347884396, 2532586056883245101, 50968075536143541551

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• base

Crossrefs

Cf. A000111, A004086.

Programs

Mathematica

IntegerReverse/@With[{nn=30},CoefficientList[Series[(1+Sin[x])/Cos[x],{x,0,nn}],x]*Table[k!,{k,0,nn}]] (* Harvey P. Dale, May 25 2023 *)

Formula

a(n) = A004086(A000111(n)). - Michel Marcus, Apr 05 2014

Extensions

More terms from Eric M. Schmidt, Apr 04 2014