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 A217438 Triangle with the chains described in A217287. 7
 1, 2, 3, 2, 3, 3, 4, 5, 4, 5, 6, 7, 5, 6, 7, 6, 7, 7, 8, 9, 10, 11, 8, 9, 10, 11, 9, 10, 11, 10, 11, 12, 13, 14, 11, 12, 13, 14, 15, 12, 13, 14, 15, 13, 14, 15, 14, 15, 15, 16, 17, 16, 17, 18, 19, 20, 21, 22, 23, 17, 18, 19, 20, 21, 22, 23, 18, 19, 20, 21, 22, 23, 19, 20, 21, 22, 23, 20, 21, 22, 23, 21, 22, 23 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The length of row n is A217287(n). LINKS Michael De Vlieger, Table of n, a(n) for n = 1..10441 (rows 1 <= n <= 1024, flattened) Michael De Vlieger, Plot (n, m) where m is a term in row n of this sequence, for rows 1 <= n <= 1024. EXAMPLE These are the first chains of the triangle: 1, 2, 3;    2, 3;       3, 4, 5;          4, 5, 6, 7;             5, 6, 7;                6, 7;                   7, 8, 9, 10, 11;                      8, 9, 10, 11;                         9, 10, 11;                            10, 11, 12, 13, 14;                                ... MATHEMATICA Block[{nn = 24, r}, r = Array[If[# == 1, 0, Total[2^(PrimePi /@ FactorInteger[#][[All, 1]] - 1)]] &, nn + Ceiling@ Sqrt@ nn]; Array[Block[{k = # + 1, s = r[[#]]}, While[UnsameQ[s, Set[s, BitOr[s, r[[k]] ] ] ], k++]; Range[#, k - 1]] &, nn] ] // Flatten (* Michael De Vlieger, May 02 2020 *) CROSSREFS Cf. A217287, A217288, A217289. Sequence in context: A205146 A031248 A030582 * A036762 A032154 A300651 Adjacent sequences:  A217435 A217436 A217437 * A217439 A217440 A217441 KEYWORD nonn,tabf AUTHOR Lior Manor, Oct 03 2012 EXTENSIONS Row 1 prepended to match A217287 and edited by Michael De Vlieger, May 02 2020. STATUS approved

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Last modified June 22 03:25 EDT 2021. Contains 345367 sequences. (Running on oeis4.)