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A226628 Index of the first element of row n of A226623. 10
1, 4, 5, 7, 8, 16, 17, 18, 19, 20, 23, 24, 25, 27, 28, 31, 32, 34, 39, 74, 76, 77, 79, 80, 86, 95, 231, 232, 233, 237, 239, 240, 241, 257, 260, 268, 276, 277, 286, 287, 289, 290, 306, 313, 322, 323, 324, 325, 351, 372, 385, 388, 392, 395, 397, 399, 437 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Geoffrey H. Morley, Table of n, a(n) for n = 1..600

CROSSREFS

a(n) is also the index of the first element of row n in A226624 to A226627.

Cf. A226612, A226629, A226631, A226632.

Sequence in context: A023629 A033164 A276324 * A140076 A135186 A011336

Adjacent sequences:  A226625 A226626 A226627 * A226629 A226630 A226631

KEYWORD

nonn

AUTHOR

Geoffrey H. Morley, Jun 13 2013

STATUS

approved

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Last modified April 20 16:17 EDT 2019. Contains 322310 sequences. (Running on oeis4.)