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 A064297 #36 Apr 20 2019 22:22:39 %S A064297 1,1,2,1,4,12,1,8,38,184,1,16,125,976,8512,1,32,414,5382,79384, %T A064297 1262816,1,64,1369,29739,752061,20562673,575780564,1,128,4522,163496, %U A064297 7110272,336067810,16230458696,789360053252,1,256,14934,896476,67005561 %N A064297 Triangle of self-avoiding rook paths joining opposite corners of n X k board. %D A064297 S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 331-339. %H A064297 Ruben Grønning Spaans, <a href="/A064297/b064297.txt">Triangle of rows 1 to 20, flattened</a> %H A064297 Steven R. Finch, <a href="/FinchGammel.html">Self-Avoiding Walks of a Rook on a Chessboard</a> [From Steven Finch, Apr 20 2019] %H A064297 Steven R. Finch, <a href="/FinchFlajolet.html">Self-Avoiding Walks of a Rook</a> [From Steven Finch, Apr 20 2019; mentioned in Finch's "Gammel" link above] %H A064297 Steven R. Finch, <a href="/FinchMarxen.html">Table of Non-Overlapping Rook Paths</a> [From Steven Finch, Apr 20 2019; mentioned in Finch's "Gammel" link above] %H A064297 Ruben Grønning Spaans, <a href="https://github.com/stubbscroll/OEIS/blob/master/A064297.c">C program</a> %e A064297 Triangle starts %e A064297 1, %e A064297 1, 2, %e A064297 1, 4, 12, %e A064297 1, 8, 38, 184, %e A064297 1, 16, 125, 976, 8512, %e A064297 1, 32, 414, 5382, 79384, 1262816, %e A064297 1, 64, 1369, 29739, 752061, 20562673, 575780564, %e A064297 1, 128, 4522, 163496, 7110272, 336067810, ... %Y A064297 Half of A064298. %Y A064297 Row/column combinations include A000012, A000079, A006192, A007786, A007787, A145403. %Y A064297 Right hand column is A007764. %Y A064297 Cf. A271465. %K A064297 nonn,tabl %O A064297 1,3 %A A064297 _Henry Bottomley_, Sep 05 2001