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 A110730 Irregular triangle read by rows in which row n lists n 1's followed by (n-1) 2's followed by (n-3) 3's ... followed by 1 n. 2
 1, 1, 1, 2, 1, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 6, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 7, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS From Omar E. Pol, May 08 2021: (Start) Row n has length A000217(n). Row sums give A000292, n >= 1. Row n lists the terms of the n-th row A333516 in nondecreasing order. (End) LINKS Table of n, a(n) for n=1..105. EXAMPLE From Omar E. Pol, May 08 2021: (Start) Triangle begins: 1; 1, 1, 2; 1, 1, 1, 2, 2, 3; 1, 1, 1, 1, 2, 2, 2, 3, 3, 4; 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5; 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 6; ... (End) MATHEMATICA Flatten@Array[Table[Table[k, #-k+1], {k, #}]&, 10] (* Giorgos Kalogeropoulos, Jun 08 2021 *) CROSSREFS Cf. A004736. Cf. A000217, A000292, A333516, A345116 (mirror). Sequence in context: A165620 A128494 A257696 * A198339 A262561 A264990 Adjacent sequences: A110727 A110728 A110729 * A110731 A110732 A110733 KEYWORD base,easy,tabf,nonn AUTHOR Amarnath Murthy, Aug 09 2005 EXTENSIONS Name clarified by Omar E. Pol, Jun 08 2021 STATUS approved

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Last modified November 28 08:51 EST 2023. Contains 367411 sequences. (Running on oeis4.)