A069340 Number of 18 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner.

1, 4684659, 4309313949364, 2192685751594010696, 842135117177233838318221, 276779468917310425392340761357, 82650556110091137942716277468309260, 23148397411303556672474237800571851799252, 6193097960464507527053208548973296715713058621

Offset: 1

Author

R. H. Hardin, Mar 16 2002

Keywords

• nonn

Crossrefs

Cf. 2 X n A048739, 3 X n A069325, 4 X n A069326, 5 X n A069327, 6 X n A069328, 7 X n A069329, 8 X n A069330, 9 X n A069331, 10 X n A069332, 11 X n A069333, 12 X n A069334, 13 X n A069335, 14 X n A069336, 15 X n A069337, 16 X n A069338, 17 X n A069339, 19 X n A069341, 20 X n A069342, n X n A069343, n X n symmetric A069344.

Extensions

a(6)-a(10) from Sean A. Irvine, Apr 28 2024