A195267 a(n) = 2*n^(2*n)*(1+ sum((1+k^(n+2)/n+k/n)/(n^k*k!), k=1..infinity)) / exp(1/n).

14, 89, 3104, 265832, 42711550, 11454711984, 4840928618302, 3108267243405312, 2924919606477510504, 3870562086323220000000, 6908112063470228210507358, 16038451894952529045493383168, 47076979725683125083464370176990, 170928617514191160703263296201650176

Offset: 1

Author

Alexander R. Povolotsky, Sep 14 2011

Keywords

• nonn

Examples

			n=1: 2*(1+ sum((1+k^3+k)/k!, k=1..infinity))/exp(1) = 14.
		

Crossrefs

Cf. A001113, A092516, A092514, A092041.