A132932 Concatenation of first n composite numbers.

4, 46, 468, 4689, 468910, 46891012, 4689101214, 468910121415, 46891012141516, 4689101214151618, 468910121415161820, 46891012141516182021, 4689101214151618202122, 468910121415161820212224

Offset: 1

Author

Omar E. Pol, Sep 12 2007

Keywords

• easy
• nonn
• base

Crossrefs

Composite numbers: A002808. Cf. A007908, A019518.

Programs

PARI

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

Extensions

Edited by Charles R Greathouse IV, Apr 28 2010

Offset set to 1 by Michel Marcus, Nov 06 2015