OFFSET

1,1

COMMENTS

The first requirement is that 10m+1, 10m+3, 10m+5, 10m+7 and 10m+9 are all composite; for 10*m+5 with the divisor 5 this is redundant. The second requirement is that 100*m plus any 2-digit number of A136333 is also composite.

EXAMPLE

m=167 is in the sequence because 1671, 1673, 1677, 1679, 16711, 16713, 16717, 16719, 16731,

16733, 16737, 16739, 16771, 16773, 16777, 16779, 16791, 16793, 16797, 16799 are composites.

CROSSREFS

KEYWORD

nonn,base,less

AUTHOR

Vladislav-Stepan Malakhovsky and Juri-Stepan Gerasimov, Jul 26 2009

EXTENSIONS

Rephrased in terms of A136333 and extended by R. J. Mathar, Aug 02 2009

STATUS

approved