A343091 - OEIS

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A343091

Number of rooted toroidal maps with n edges and no separating cycles or isthmuses.

1, 8, 67, 520, 3978, 29988, 224295, 1667888, 12352126, 91196512, 671717950, 4938370736, 36251576684, 265787720908, 1946696834735, 14245828801024, 104173927718694, 761302443498960, 5560564162774202, 40595140188994224, 296242813675800300, 2161031983823779912

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 2..100

CROSSREFS

Row sums of A343090.

Cf. A343093.

Sequence in context: A166815 A166797 A196453 * A037594 A037685 A228419

Adjacent sequences: A343088 A343089 A343090 * A343092 A343093 A343094

KEYWORD

nonn

AUTHOR

Andrew Howroyd, Apr 04 2021

STATUS

approved