This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A069376 #12 Apr 30 2024 01:51:22 %S A069376 1,9369319,13849295944501,10318980754919691695, %T A069376 5492742925983606246158973,2412721380632681627952855331063, %U A069376 939235577245516358772982740906048485,337126657379092371139889358274385473404871,114267130121924306158303467152135299942675610461 %N A069376 Number of 18 X n binary arrays with a path of adjacent 1's from top row to bottom row. %Y A069376 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. %K A069376 nonn %O A069376 1,2 %A A069376 _R. H. Hardin_, Mar 22 2002 %E A069376 a(5)-a(9) from _Sean A. Irvine_, Apr 30 2024