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 A203554 Lodumo_2 of A079813, which is n 0's followed by n 1's.. 1
 0, 1, 2, 4, 3, 5, 6, 8, 10, 7, 9, 11, 12, 14, 16, 18, 13, 15, 17, 19, 20, 22, 24, 26, 28, 21, 23, 25, 27, 29, 30, 32, 34, 36, 38, 40, 31, 33, 35, 37, 39, 41, 42, 44, 46, 48, 50, 52, 54, 43, 45, 47, 49, 51, 53, 55 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Permutation of nonnegative numbers. Lodumo_k of sequences is defined in A159970. The sequence has a natural decomposition into irregular triangle (see example). The length of row n is A008619(n). Rows sums are the cubes (A000578) interspersed with A007531. First column: A002378 interspersed with A002061. LINKS EXAMPLE Triangle begins : 0 1 2, 4 3, 5 6, 8, 10 7, 9, 11 12, 14, 16, 18 13, 15, 17, 19 20, 22, 24, 26, 28 21, 23, 25, 27, 29 30, 32, 34, 36, 38, 40 31, 33, 35, 37, 39, 41 42, 44, 46, 48, 50, 52, 54 43, 45, 47, 49, 51, 53, 55 56, 58, 60, 62, 64, 66, 68, 70 57, 59, 61, 63, 65, 67, 69, 71 72, 74, 76, 78, 80, 82, 84, 86, 88 73, 75, 77, 79, 81, 83, 85, 87, 89... Row sums : 0 = 1^3 -1 = 0 ; 1 = 1^3 = 1 ; 2 + 4 = 2^3 - 2 = 6 ; 3 + 5 = 2^3 = 8 ; 6 + 8 + 10 = 3^3 - 3 = 24 ; 7 + 9 + 11 = 3^3 = 27 ; 12 + 14 + 16 + 18 = 4^3 - 4 = 60 ; 13 + 15 + 17 + 19 = 4^3 = 64 ; 20 + 22 + 24 + 26 + 28 = 5^3 - 5 = 120 ; 21 + 23 + 25 + 27 + 29 = 5^3 = 125 ; etc... CROSSREFS Cf. A079813, A159970, A203553. Cf. A028387, A028552, A002061, A002378, A000578, A007531. Sequence in context: A244724 A132948 A102569 * A255003 A244732 A338254 Adjacent sequences:  A203551 A203552 A203553 * A203555 A203556 A203557 KEYWORD nonn AUTHOR Philippe Deléham, Jan 02 2012 STATUS approved

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Last modified July 28 22:38 EDT 2021. Contains 346336 sequences. (Running on oeis4.)