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 A084193 #27 Jan 15 2021 15:54:49 %S A084193 1,2,2,3,4,3,4,7,8,4,5,10,15,12,5,6,14,26,24,16,6,7,18,35,44,36,20,7, %T A084193 8,23,52,71,70,52,26,8,9,28,69,114,126,108,70,32,9,10,34,89,165,216, %U A084193 211,162,93,40,10,11,40,112,234,345,388,336,228,121,46,11,12,47,146,326,512 %N A084193 Array read by antidiagonals: T(k,n) = solution to postage stamp problem with n stamps and k denominations (n >= 1, k >= 1). %C A084193 _Fred Lunnon_ [W. F. Lunnon] defines "solution" to be the smallest value not obtainable by the best set of stamps. The solutions given in this sequence and in A001208, A001209, A001210, A001211, A001212, ... are one lower than this, that is, the sequence gives the largest number obtainable without a break using the best set of stamps. %H A084193 <a href="/index/Pos#postage_stamp_problem">Index to sequences related to the Postage Stamp Problem</a> %e A084193 Array begins: %e A084193 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ... %e A084193 2, 4, 8, 12, 16, 20, 26, 32, 40, 46, ... %e A084193 3, 7, 15, 24, 36, 52, 70, 93, 121, ... %e A084193 4, 10, 26, 44, 70, 108, 162, 228, ... %e A084193 5, 14, 35, 71, 126, 211, 336, ... %e A084193 6, 18, 52, 114, 216, 388, ... %e A084193 7, 23, 69, 165, 345, ... %e A084193 8, 28, 89, 234, ... %e A084193 9, 34, 112, ... %e A084193 10, 40, ... %e A084193 11, ... %e A084193 ... %Y A084193 A084192 gives transposed array. Rows and columns give rise to A014616, A001208, A001209, A001210, A001211, A053346, A053348, A001212, A001213, A001214, A001215, A001216, A005342, A005343, A005344, A075060. %K A084193 nonn,easy,nice,tabl %O A084193 0,2 %A A084193 _N. J. A. Sloane_, Jun 20 2003 %E A084193 Entry improved by comments from John Seldon (johnseldon(AT)onetel.com), Sep 15 2004 %E A084193 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Jun 26 2003 %E A084193 Comments corrected by _Shawn Pedersen_, Apr 17 2012