A272602 E.g.f.: exp( sum(n>=1, x^(n!) / n ) ).

1, 1, 2, 4, 10, 26, 316, 1912, 14204, 83260, 513496, 2918576, 43605112, 442060984, 5396258960, 51589877536, 502620599056, 4387660231952, 77691034349344, 1065687761143360, 17601265218632096, 230878891157853856, 3055183837594858432, 35865234134641395584, 155845649043266241280960

Offset: 0

Author

Joerg Arndt, May 29 2016

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..452

Crossrefs

Cf. A272603 (e.g.f.: exp( sum(n>=1, x^(n!) / n! ) ) ).

Programs

PARI

N=66;x='x+O('x^N); Vec(serlaplace(exp(sum(n=1,10,x^(n!)/n))))

Formula

E.g.f.: exp( sum(n>=1, x^(n!) / n ) ).