

A114308


Selfdescribing sequence: sequence starts with a(1) = 1 and a(n) is chosen to be the smallest number > a(n1) such that the assertion "sequence gives the positions of the odd digits when the sequence is read as a string of digits" is true.


3



1, 4, 6, 7, 8, 9, 11, 12, 13, 16, 21, 22, 24, 31, 41, 42, 44, 46, 50, 60, 62, 64, 66, 71, 81, 83, 84, 85, 86, 88, 200, 201, 210, 301, 400, 410, 420, 422, 423, 431, 510, 520, 600, 602, 604, 606, 608, 620, 622, 624, 626, 628, 640, 642, 644, 646, 648, 660
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OFFSET

1,2


LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..480


EXAMPLE

Brackets indicate the odd digits in the sequence:
Sequence: (1),4,6,(7),8,(9),(1)(1),(1)2, (1)(3),(1)6
Positions of odd digits: 1st 4th 6th 7th 8th 9th 11th 12th 13th ..., which is the sequence itself.


CROSSREFS

Cf. A125132.
Sequence in context: A043860 A043869 A167524 * A299411 A079000 A047509
Adjacent sequences: A114305 A114306 A114307 * A114309 A114310 A114311


KEYWORD

base,easy,nonn


AUTHOR

Eric Angelini, Feb 05 2006


EXTENSIONS

More terms from N. J. A. Sloane, Jan 10 2007


STATUS

approved



