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 A268931 #15 Feb 28 2016 07:54:56 %S A268931 3,3,2,3,5,0,1,2,7,2,1,1,7,0,0,3,6,3,0,3,2,3,6,2,11,7,7,0,1,1,2,7,14, %T A268931 3,0,2,3,6,1,14,13,15,2,3,2,3,5,3,13,1,0,14,4,0,0,1,5,5,3,11,17,10,0, %U A268931 0,0,0,3,2,4,10,8,8,25,13,3,3,7,2,3,1,1,15,12,11,19,26,1,4,4,0,0,1,2,6,1,11,18,19,0,3,6,0,7,3,2 %N A268931 Square array: A(i,j) = F(A065091(i),A065091(j)), where F(a,b) is the dyadic function defined in A269158. Array is read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ... %H A268931 Antti Karttunen, <a href="/A268931/b268931.txt">Table of n, a(n) for n = 1..9591; the first 138 antidiagonals of the array</a> %F A268931 A(i,j) = F(A065091(i),A065091(j)) = A269158(A065091(i),A006254(j)), function F defined as in A269158. %e A268931 The top left [1 .. 19] x [1 .. 19] section of the array: %e A268931 3, 3, 3, 1, 1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 1, 3, 1 %e A268931 2, 5, 2, 1, 6, 6, 1, 6, 5, 5, 2, 1, 2, 2, 6, 1, 5, 6, 5 %e A268931 0, 7, 7, 3, 2, 2, 1, 3, 5, 4, 1, 6, 3, 5, 5, 0, 7, 3, 7 %e A268931 2, 0, 0, 11, 7, 14, 13, 3, 10, 15, 1, 7, 4, 10, 5, 11, 6, 3, 2 %e A268931 0, 3, 7, 14, 13, 1, 11, 8, 12, 11, 2, 2, 9, 6, 5, 11, 4, 10, 15 %e A268931 2, 7, 3, 15, 0, 17, 8, 11, 18, 10, 2, 3, 13, 0, 8, 8, 14, 1, 2 %e A268931 0, 0, 2, 14, 10, 25, 19, 19, 10, 16, 26, 2, 2, 2, 18, 9, 17, 24, 24 %e A268931 2, 3, 4, 0, 13, 26, 0, 23, 8, 11, 26, 29, 5, 7, 22, 27, 26, 9, 27 %e A268931 2, 0, 0, 3, 1, 3, 27, 29, 29, 14, 22, 10, 31, 26, 5, 25, 30, 5, 9 %e A268931 0, 0, 3, 4, 6, 27, 3, 28, 19, 31, 22, 28, 8, 15, 10, 31, 2, 6, 14 %e A268931 0, 7, 4, 0, 7, 3, 27, 31, 19, 19, 37, 33, 23, 16, 37, 23, 19, 52, 48 %e A268931 2, 0, 7, 14, 11, 2, 3, 28, 3, 21, 0, 41, 20, 23, 34, 28, 40, 62, 62 %e A268931 0, 3, 0, 15, 0, 12, 1, 6, 22, 3, 54, 61, 43, 43, 29, 43, 27, 62, 0 %e A268931 2, 7, 2, 1, 11, 1, 1, 0, 23, 0, 53, 62, 0, 47, 28, 42, 16, 1, 62 %e A268931 2, 3, 0, 4, 0, 25, 3, 3, 16, 31, 0, 3, 60, 57, 53, 29, 26, 43, 38 %e A268931 2, 0, 3, 0, 2, 25, 26, 8, 0, 4, 54, 53, 0, 1, 44, 59, 31, 37, 2 %e A268931 0, 0, 2, 15, 9, 31, 0, 15, 3, 31, 54, 1, 50, 61, 47, 38, 61, 35, 35 %e A268931 0, 7, 0, 0, 11, 0, 27, 10, 4, 5, 53, 63, 61, 2, 42, 38, 34, 67, 67 %e A268931 2, 0, 0, 1, 10, 3, 27, 28, 12, 9, 53, 63, 3, 57, 35, 1, 38, 0, 71 %o A268931 (Scheme) (define (A268931 n) (A269158auxbi (A065091 (A002260 n)) (A065091 (A004736 n)))) ;; Code for A269158auxbi given in A269158. %Y A268931 Transpose: A268932. %Y A268931 Cf. A065091 (the main diagonal). %Y A268931 Cf. A006254, A269158. %K A268931 nonn,tabl %O A268931 1,1 %A A268931 _Antti Karttunen_, Feb 19 2016