The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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). 4
 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 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 22 11:06 EDT 2022. Contains 353949 sequences. (Running on oeis4.)