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A214337
Triangle read by rows: T(n,k) = number of rooted maps with n vertices and k faces on a non-orientable surface of type 3/2 (0 <= k <= n).
5
0, 0, 41, 0, 690, 16925, 0, 7150, 237652, 4306778, 0, 58760, 2518957, 56864524, 910734615, 0, 420182, 22417804, 613687758, 11675167470, 174833737848
OFFSET
0,3
LINKS
Didier Arquès and Alain Giorgetti, Counting rooted maps on a surface, Theoret. Comput. Sci. 234 (2000), no. 1-2, 255--272. MR1745078 (2001f:05078).
EXAMPLE
Triangle begins:
0;
0, 41;
0, 690, 16925;
0, 7150, 237652, 4306778;
0, 58760, 2518957, 56864524, 910734615;
0, 420182, 22417804, 613687758, 11675167470, 174833737848;
...
CROSSREFS
Diagonals give A118448, A214335, A213336, A213338.
Cf. A214806.
Sequence in context: A111401 A116101 A167265 * A053342 A297205 A283895
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Jul 27 2012
STATUS
approved