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 A076105 a(1)=1 (first row) and then the n-th row of this triangle contains the least set of n unused natural numbers whose sum is a multiple of the sum of the previous row. 6
 1, 2, 3, 4, 5, 6, 7, 8, 9, 21, 10, 11, 12, 13, 44, 14, 15, 16, 17, 18, 100, 19, 20, 22, 23, 24, 25, 47, 26, 27, 28, 29, 30, 31, 32, 157, 33, 34, 35, 36, 37, 38, 39, 40, 68, 41, 42, 43, 45, 46, 48, 49, 50, 51, 305, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 155, 62, 63, 64, 65, 66, 67 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The first (n-1) terms of the n-th row contain n-1 smallest natural numbers which have not occurred earlier and the last term is chosen to satisfy the requirement. Permutation A094280 is defined similarly, but the sum of the next row must be greater than that of the current row. LINKS EXAMPLE 1; 2,  3; 4,  5,  6; 7,  8,  9,  21; 10, 11, 12, 13, 44; 14, 15, 16, 17, 18, 100; CROSSREFS Inverse: A122154. Cf. A076101, A076102, A076103, A076104. Sequence in context: A114800 A079170 A319387 * A094280 A082323 A069571 Adjacent sequences:  A076102 A076103 A076104 * A076106 A076107 A076108 KEYWORD nonn,tabl AUTHOR Amarnath Murthy, Oct 08 2002 EXTENSIONS More terms from David Wasserman, Apr 02 2005 Description edited by Antti Karttunen, Aug 25 2006 STATUS approved

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Last modified August 21 18:38 EDT 2019. Contains 326168 sequences. (Running on oeis4.)