A058893 Triangle arising in enumeration of maps on projective plane.

1, 5, 9, 22, 112, 118, 93, 899, 2346, 1773, 386, 5940, 27446, 48426, 28650, 1586, 35138, 247752, 745180, 995290, 484578

Offset: 1

Author

N. J. A. Sloane, Jan 08 2001

Keywords

• nonn
• tabl
• more

Examples

			Triangle starts:
1;
5,9;
22,112,118;
93,899,2346,1773;
...
		

Links

• E. A. Bender, E. R. Canfield and R. W. Robinson, The enumeration of maps on the torus and the projective plane, Canad. Math. Bull., 31 (1988), 257-271; see p. 270.

Crossrefs

A000346 is first column.