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A267180 Triangle read by rows: T(n,k) = number of rooted maps with n edges on a nonorientable surface of genus k (1 <= k <= n). 3
1, 10, 4, 98, 84, 41, 982, 1340, 1380, 488, 10062, 19280, 31225, 23320, 8229, 105024, 263284, 592824, 696912, 516958, 164892, 1112757, 3486224, 10185056, 16662492, 19381145, 12980716, 4016613, 11934910, 45247084, 164037704, 348539072, 562395292, 590136856, 382630152, 112818960 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

David M. Jackson  and Terry I. Visentin, An Atlas of the Smaller Maps in Orientable and Nonorientable Surfaces, Chapman & Hall/CRC, circa 2000. See page 227.

LINKS

Table of n, a(n) for n=1..36.

EXAMPLE

Triangle begins:

1,

10,4,

98,84,41,

982,1340,1380,488,

10062,19280,31225,23320,8229,

105024,263284,592824,696912,516958,164892,

1112757,3486224,10185056,16662492,19381145,12980716,4016613,

11934910,45247084,164037704,348539072,562395292,590136856,382630152,112818960

...

CROSSREFS

See A238396 for analog for orientable surfaces.

Columns give A007137, A006344.

Sequence in context: A180866 A232908 A216653 * A038306 A317597 A320938

Adjacent sequences:  A267177 A267178 A267179 * A267181 A267182 A267183

KEYWORD

nonn,tabl

AUTHOR

N. J. A. Sloane, Jan 16 2016

STATUS

approved

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Last modified June 13 00:57 EDT 2021. Contains 344980 sequences. (Running on oeis4.)