A032111 "BIJ" (reversible, indistinct, labeled) transform of 2,2,2,2...

2, 6, 38, 366, 4502, 66606, 1149878, 22687566, 503589782, 12420052206, 336947795318, 9972186170766, 319727684645462, 11039636939221806, 408406422098722358, 16116066766061589966, 675700891505466507542

Offset

1,1

Links

Table of n, a(n) for n=1..17.

C. G. Bower, Transforms (2)

Formula

E.g.f.: 2(-2+3e^x-e^(2x))/(2-3e^x).

Crossrefs

Equals A050351(n) + 1. Cf. A004123, A027882.

Sequence in context: A197972 A068184 A067106 * A013703 A002031 A184731

Adjacent sequences: A032108 A032109 A032110 * A032112 A032113 A032114

Keyword

nonn

Author

Christian G. Bower

Status

approved