A069376 Number of 18 X n binary arrays with a path of adjacent 1's from top row to bottom row.

1, 9369319, 13849295944501, 10318980754919691695, 5492742925983606246158973, 2412721380632681627952855331063, 939235577245516358772982740906048485, 337126657379092371139889358274385473404871, 114267130121924306158303467152135299942675610461

Offset

1,2

Links

Table of n, a(n) for n=1..9.

Crossrefs

Cf. 1 X n A000225, 2 X n A005061, n X 2 A001333, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452.

Sequence in context: A234395 A204510 A328207 * A281570 A274042 A066703

Adjacent sequences: A069373 A069374 A069375 * A069377 A069378 A069379

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Extensions

a(5)-a(9) from Sean A. Irvine, Apr 30 2024

Status

approved