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 A129600 #10 Dec 14 2023 14:38:03 %S A129600 0,1,1,2,3,2,3,4,4,3,4,7,6,7,4,5,8,8,8,8,5,6,11,12,15,12,11,6,7,12,9, %T A129600 16,16,9,12,7,8,15,14,23,24,23,14,15,8,9,16,16,24,19,19,24,16,16,9,10, %U A129600 19,24,31,28,13,28,31,24,19,10,11,20,17,32,32,17,17,32,32,17,20,11,12 %N A129600 Array A(i,j) of binary run-length encoded product of i and j, read by ascending antidiagonals. %F A129600 A(i,j) = A075158(((A075157(i)+1)*(A075157(j)+1)) - 1). %o A129600 (MIT/GNU Scheme) %o A129600 (define (A129600bi col row) (A075158 (-1+ (* (1+ (A075157 col)) (1+ (A075157 row)))))) %o A129600 (define (A129600 n) (A129600bi (A025581 n) (A002262 n))) %Y A129600 Cf. A003991, A129601. %Y A129600 Cf. A129602 (center diagonal), A014601 (row 1 apart from the first term). %K A129600 nonn,tabl %O A129600 0,4 %A A129600 _Antti Karttunen_, May 01 2007 %E A129600 Name edited by _Michel Marcus_, Dec 01 2021