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A114318 Self-describing sequence. See the sequence as a succession of digits: then a(n) is the position of a composite digit in the sequence. 1
2, 4, 5, 6, 8, 9, 14, 40, 50, 54, 55, 57, 70, 71, 72, 73, 75, 77, 100, 101, 102, 400, 500, 501, 540, 554, 604, 700, 701, 702, 703, 844, 854, 1400, 1500, 1501, 1502, 1503, 1505, 4440, 5000, 5001, 5002, 5003, 5005, 5007, 5010, 5011, 5012, 5013, 5015, 5017, 5020 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

"Composite" digits are : 4, 6, 8 and 9.

LINKS

Diana Mecum, Table of n, a(n) for n=1,...,148

EXAMPLE

Composite digits are between brackets:

Sequence: 2,(4),5,(6),(8),(9),1(4),(4)0,50,5(4),55...

Digit pos: 2nd 4th 5th 6th 8th 9th 14th ... = sequence itself.

CROSSREFS

Sequence in context: A080086 A229133 A015844 * A169956 A035500 A080653

Adjacent sequences:  A114315 A114316 A114317 * A114319 A114320 A114321

KEYWORD

base,easy,nonn

AUTHOR

Eric Angelini, Feb 05 2006

EXTENSIONS

a(28)-a(148) from Diana L. Mecum, Dec 30 2008

STATUS

approved

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Last modified November 21 11:35 EST 2019. Contains 329370 sequences. (Running on oeis4.)