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 A138197 #8 Mar 07 2022 02:51:51 %S A138197 2,3,0,5,1,0,7,1,-3,-2,11,5,-1,-5,-2,13,7,1,-5,-5,14,17,11,5,-5,-21, %T A138197 -27,24,19,13,11,11,1,-37,-91,-54,23,13,5,5,17,27,-13,-153,-294,29,21, %U A138197 11,-1,-9,3,49,87,-57,-588,31,23,17,13,5,-19,-51,-9,237,527,-156,37,27,15,7,15,35,7,-159,-347,95,1871,3212,41,35,25,5,-15 %N A138197 Array read by antidiagonals: T(n,k) = T(n-1,k) + T(n,k+1) - T(n,k+2). %C A138197 Rule A096379 applied recursively. %F A138197 T(0,k) = A000040(k), and T(n,k) = T(n-1,k) + T(n,k+1) - T(n,k+2). %e A138197 Top left corner of array: %e A138197 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, ... = A000040 %e A138197 0, 1, 1, 5, 7, 11, 13, 13, 21, 23, ... = A096379 %e A138197 0, -3, -1, 1, 5, 11, 5, 11, 17, 15, ... %e A138197 -2, -5, -5, -5, 11, 5, -1, 13, 7, 5, ... %e A138197 -2, -5, -21, 1, 17, -9, 5, 15, -15, -9, ... %e A138197 14, -27, -37, 27, 3, -19, 35, 9, -71, -5, ... %e A138197 24, -91, -13, 49, -51, 7, 115, -57, -167, 69, ... %e A138197 -54, -153, 87, -9, -159, 179, 225, -293, -217, 223, ... %e A138197 -294, -57, 237, -347, -205, 697, 149, -733, -59, 341, ... %e A138197 -588, 527, 95, -1249, 343, 1579, -525, -1133, 335, 271, ... %e A138197 -156, 1871, -1497, -2485, 2447, 2187, -1993, -1069, 643, 261, ... %e A138197 ... %Y A138197 Cf. A000040, A096379. %K A138197 sign,tabl %O A138197 1,1 %A A138197 _Zak Seidov_, Mar 05 2008 %E A138197 Typo corrected by _Travis Hoppe_, Apr 24 2008