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A082154 Dispersion of the complement of the hexagonal numbers. 2
1, 2, 6, 3, 8, 15, 4, 10, 18, 28, 5, 12, 21, 32, 45, 7, 14, 24, 36, 50, 66, 9, 17, 27, 40, 55, 72, 91, 11, 20, 31, 44, 60, 78, 98, 120, 13, 23, 35, 49, 65, 84, 105, 128, 153, 16, 26, 39, 54, 71, 90, 112, 136, 162, 190, 19, 30, 43, 59, 77, 97, 119, 144, 171, 200, 231, 22, 34 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Rectangular array read by antidiagonals; a permutation of the natural numbers. (column 1) = (hexagonal numbers) = A000384(n) = n(2n-1). (Dispersion of complement of column 1 of A082154) = (Transpose of A082155).

LINKS

Table of n, a(n) for n=1..68.

C. Kimberling, Interspersions and Dispersions.

C. Kimberling, Interspersions and dispersions, Proceedings of the American Mathematical Society, 117 (1993) 313-321.

Clark Kimberling and John E. Brown, Partial Complements and Transposable Dispersions, J. Integer Seqs., Vol. 7, 2004.

EXAMPLE

Northwest corner:

1 2 3 4 5

6 8 10 12 14

15 18 21 24 27

28 32 36 40 44

45 50 55 60 65

CROSSREFS

Cf. A082155, A000384.

Sequence in context: A256592 A256965 A191708 * A134564 A016637 A133917

Adjacent sequences:  A082151 A082152 A082153 * A082155 A082156 A082157

KEYWORD

nonn,tabl

AUTHOR

Clark Kimberling, Apr 05 2003

STATUS

approved

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Last modified July 23 14:11 EDT 2019. Contains 325254 sequences. (Running on oeis4.)