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A132932 Concatenation of first n composite numbers. 2
4, 46, 468, 4689, 468910, 46891012, 4689101214, 468910121415, 46891012141516, 4689101214151618, 468910121415161820, 46891012141516182021, 4689101214151618202122, 468910121415161820212224 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

PROG

(PARI) lista(nn) = {s = ""; forcomposite(n=1, nn, s = concat(s, Str(n)); print1(eval(s), ", "); ); } \\ Michel Marcus, Nov 06 2015

CROSSREFS

Composite numbers: A002808. Cf. A007908, A019518.

Sequence in context: A218997 A279523 A194488 * A231787 A173716 A320229

Adjacent sequences:  A132929 A132930 A132931 * A132933 A132934 A132935

KEYWORD

easy,nonn,base

AUTHOR

Omar E. Pol, Sep 12 2007

EXTENSIONS

Edited by Charles R Greathouse IV, Apr 28 2010

Offset set to 1 by Michel Marcus, Nov 06 2015

STATUS

approved

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Last modified June 14 12:04 EDT 2021. Contains 345025 sequences. (Running on oeis4.)