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 A259985 #21 Aug 27 2016 05:38:20 %S A259985 1,1,1,1,4,2,1,9,18,6,1,16,72,96,24,1,20,130,320,265,44,1,24,204,752, %T A259985 1185,672,80,1,28,294,1456,3521,3892,1617,144,1,32,400,2496,8264, %U A259985 14272,11776,3776,264,1,36,522,3936,16659,39924,52071,33480,8577,484,1,40,660,5840,30210,93568,171060,175360,90745,19080,888,1,44,814,8272,50677,193556,461208,667832,554532,236808,41745,1632 %N A259985 Triangle read by rows: coefficients of rook polynomials. %H A259985 Earl Glen Whitehead, Jr., <a href="http://dx.doi.org/10.1017/S1446788700012337">Four-discordant permutations</a>, J. Austral. Math. Soc. Ser. A 28 (1979), no. 3, 369-377. %H A259985 Earl Glen Whitehead, Jr., <a href="/A259985/a259985.pdf">Four-discordant permutations (Table 1)</a> (Annotated scanned table) %e A259985 Triangle begins: %e A259985 1; %e A259985 1, 1; %e A259985 1, 4, 2; %e A259985 1, 9, 18, 6; %e A259985 1, 16, 72, 96, 24; %e A259985 1, 20, 130, 320, 265, 44; %e A259985 1, 24, 204, 752, 1185, 672, 80; %e A259985 1, 28, 294, 1456, 3521, 3892, 1617, 144; %e A259985 1, 32, 400, 2496, 8264, 14272, 11776, 3776, 264; %e A259985 1, 36, 522, 3936, 16659, 39924, 52071, 33480, 8577, 484; %e A259985 1, 40, 660, 5840, 30210, 93568, 171060, 175360, 90745, 19080, 888; ... %Y A259985 Diagonals give A004306, A005777, A005778. %K A259985 nonn,tabl %O A259985 0,5 %A A259985 _N. J. A. Sloane_, Jul 13 2015