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A054790 Earliest sequence with a(a(n))=10n. 1
0, 2, 10, 4, 30, 6, 50, 8, 70, 11, 20, 90, 13, 120, 15, 140, 17, 160, 19, 180, 100, 22, 210, 24, 230, 26, 250, 28, 270, 31, 40, 290, 33, 320, 35, 340, 37, 360, 39, 380, 300, 42, 410, 44, 430, 46, 450, 48, 470, 51, 60, 490, 53, 520, 55, 540, 57, 560, 59, 580, 500, 62, 610 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Index entries for sequences of the a(a(n)) = 2n family

CROSSREFS

Cf. A002516, A002517, A002518, A007379.

Sequence in context: A199832 A189878 A189869 * A140393 A000170 A038216

Adjacent sequences:  A054787 A054788 A054789 * A054791 A054792 A054793

KEYWORD

nice,nonn

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Apr 27 2000

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Last modified February 15 08:12 EST 2012. Contains 205724 sequences.