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 A251716 #8 Dec 19 2014 14:15:53 %S A251716 2,3,4,7,5,6,8,9,7,8,20,13,11,10,10,21,22,15,13,12,12,28,23,24,17,16, %T A251716 17,14,41,30,25,34,27,18,19,16,49,43,32,36,46,38,26,21,18,59,51,45,35, %U A251716 38,66,40,32,24,20,60,61,53,47,67,54,68,42,34,26,25,77 %N A251716 Array of positions of A251637(n,k) in A098550. %C A251716 T(n,k) = A098551(A251637(n,k)); %C A251716 A251637(n,k) = A098550(T(n,k)); %C A251716 T(n,k+1) > T(n,k) + 1, according definition of A098550; %C A251716 conjecture: A098550 is a permutation of the positive integers iff all integers > 1 occur exactly once. %H A251716 Reinhard Zumkeller, <a href="/A251716/b251716.txt">Rows n = 1..125 of triangle, flattened</a> %e A251716 . n p | Indices of A251637(n,k) in A098550, n = 1..25, k= 1..14 %e A251716 . -------+------------------------------------------------------------- %e A251716 . 1 2 | 2 4 6 8 10 12 14 16 18 20 25 27 29 31 %e A251716 . 2 3 | 3 5 7 10 12 17 19 21 24 26 28 31 33 37 %e A251716 . 3 5 | 7 9 11 13 16 18 26 32 34 36 39 45 48 50 %e A251716 . 4 7 | 8 13 15 17 27 38 40 42 44 58 68 70 72 74 %e A251716 . 5 11 | 20 22 24 34 46 66 68 73 91 100 122 124 126 128 %e A251716 . 6 13 | 21 23 25 36 38 54 83 95 108 120 122 139 178 185 %e A251716 . 7 17 | 28 30 32 35 67 70 111 115 126 141 174 183 185 218 %e A251716 . 8 19 | 41 43 45 47 72 82 113 123 163 166 189 201 221 248 %e A251716 . 9 23 | 49 51 53 56 74 93 149 157 197 228 230 244 252 304 %e A251716 . 10 29 | 59 61 63 96 105 121 188 198 250 259 265 314 323 387 %e A251716 . 11 31 | 60 62 64 98 135 179 200 207 261 263 268 335 343 402 %e A251716 . 12 37 | 77 79 81 118 161 193 241 253 320 348 392 400 411 413 %e A251716 . 13 41 | 85 87 89 146 172 208 266 278 350 358 442 451 478 553 %e A251716 . 14 43 | 86 88 90 148 184 210 280 286 352 369 459 487 489 561 %e A251716 . 15 47 | 99 101 103 109 150 199 306 344 403 406 509 516 538 616 %e A251716 . 16 53 | 112 114 116 131 227 295 349 381 455 470 518 574 610 704 %e A251716 . 17 59 | 125 127 129 219 254 305 389 439 472 511 626 640 697 717 %e A251716 . 18 61 | 130 132 134 136 242 258 396 445 474 531 628 654 726 795 %e A251716 . 19 67 | 140 142 144 147 292 307 458 463 576 581 630 740 772 871 %e A251716 . 20 71 | 151 153 155 287 308 397 469 501 623 636 775 815 837 932 %e A251716 . 21 73 | 156 158 160 162 316 399 480 532 633 686 801 839 865 952 %e A251716 . 22 79 | 165 167 169 289 341 418 515 545 687 690 841 855 917 1033 %e A251716 . 23 83 | 173 175 177 182 321 360 555 577 711 723 843 898 988 1083 %e A251716 . 24 89 | 192 194 196 333 382 512 585 641 771 800 933 972 1075 1155 %e A251716 . 25 97 | 202 204 206 211 370 426 631 695 802 844 1052 1092 1177 1266 %e A251716 . --------------------------------------------------------------------- %e A251716 See table A251637 for A098550(T(n,k)). %o A251716 (Haskell) seen as table read by rows: %o A251716 a251716 n k = a251716_tabl !! (n-1) !! (k-1) %o A251716 a251716_row n = a251716_tabl !! (n-1) %o A251716 a251716_tabl = map (map a098551) a251637_tabl %Y A251716 Cf. A098550, A098551, A251637, A251237 (first row), A251553 (second row). %Y A251716 Cf. A251541 (first column). %K A251716 nonn,tabl %O A251716 1,1 %A A251716 _Reinhard Zumkeller_, Dec 09 2014