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 A049430 #42 Aug 24 2023 12:05:49 %S A049430 1,0,1,0,1,1,0,1,4,2,0,1,11,11,3,0,1,34,77,35,6,0,1,107,499,412,104, %T A049430 11,0,1,368,3442,4888,2009,319,23,0,1,1284,24128,57122,36585,8869,951, %U A049430 47,0,1,4654,173428,667959,647680,231574,36988,2862,106,0,1,17072,1262464,7799183,11173880,5712765,1297366,146578,8516,235 %N A049430 Triangle read by rows: T(n,d) is the number of distinct properly d-dimensional polyominoes (or polycubes) with n cells (n >= 1, d >= 0). %H A049430 W. F. Lunnon, <a href="http://dx.doi.org/10.1093/comjnl/18.4.366">Counting multidimensional polyominoes</a>. Computer Journal 18 (1975), no. 4, pp. 366-367. %e A049430 Triangle begins: %e A049430 1 %e A049430 0 1 %e A049430 0 1 1 %e A049430 0 1 4 2 %e A049430 0 1 11 11 3 %e A049430 0 1 34 77 35 6 %e A049430 0 1 107 499 412 104 11 %e A049430 0 1 368 3442 4888 2009 319 23 %e A049430 0 1 1284 24128 57122 36585 8869 951 47 %e A049430 0 1 4654 173428 667959 647680 231574 36988 2862 106 %e A049430 0 1 17072 1262464 7799183 11173880 5712765 1297366 146578 8516 235 %e A049430 ... %Y A049430 Cf. A049429 (col. d=0 omitted), A195738 (oriented), A195739 (fixed). %Y A049430 Row sums give A005519. Columns give A006765, A006766, A006767, A006768. %Y A049430 Diagonals (with algorithms) are A000055, A036364, A355053. %Y A049430 Cf. A330891 (cumulative sums of the rows). %K A049430 nonn,nice,tabl,hard %O A049430 1,9 %A A049430 Richard C. Schroeppel %E A049430 Edited by _N. J. A. Sloane_, Sep 23 2011 %E A049430 More terms from _John Niss Hansen_, Mar 31 2015