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 A377442 #15 Nov 17 2024 07:36:46 %S A377442 1,1,1,1,1,2,1,1,2,5,1,1,2,4,14,1,1,2,3,9,42,1,1,2,2,6,22,132,1,1,2,1, %T A377442 5,12,57,429,1,1,2,0,6,6,26,154,1430,1,1,2,-1,9,-2,15,59,429,4862,1,1, %U A377442 2,-2,14,-18,24,24,138,1223,16796,1,1,2,-3,21,-48,77,-23,53,332,3550,58786,1,1,2,-4,30,-98,222,-226,102,107,814,10455,208012,1,1,2 %N A377442 Square array read by rising antidiagonals: T(n, k) = A377441(-n, k), an extension of A377441 into the domain of negative n. %C A377442 The main entry for this array is A377441. %e A377442 The array begins: %e A377442 [ 0] 1, 1, 2, 5, 14, 42, 132, 429, 1430, ... = A000108 %e A377442 [-1] 1, 1, 2, 4, 9, 22, 57, 154, 429, ... = A105633 %e A377442 [-2] 1, 1, 2, 3, 6, 12, 26, 59, 138, ... = A152172 %e A377442 [-3] 1, 1, 2, 2, 5, 6, 15, 24, 53, ... %e A377442 [-4] 1, 1, 2, 1, 6, -2, 24, -23, 102, ... %e A377442 [-5] 1, 1, 2, 0, 9, -18, 77, -226, 765, ... %e A377442 [-6] 1, 1, 2, -1, 14, -48, 222, -921, 3914, ... %e A377442 [-7] 1, 1, 2, -2, 21, -98, 531, -2756, 14373, ... %e A377442 Row index written as [m] is corresponding to A377441(m, k). %Y A377442 Cf. A377441 (The main entry for this sequence). %Y A377442 Cf. A105633 (row -1), A152172 (row -2). %Y A377442 Cf. A000108 (row 0), A254316 (row 1). %Y A377442 Cf. A000012 (Hankel transform of row 0), A006720 (Hankel transform of row 1). %Y A377442 Cf. A330025 (Hankel transform of row -1), A328380 (Hankel transform of row -2). %Y A377442 Cf. A371965, A377443. %K A377442 sign,tabl %O A377442 0,6 %A A377442 _Thomas Scheuerle_, Nov 04 2024