A274831 Strobogrammatic (A000787) composite numbers whose prime factors are strobogrammatic as well.

1111, 11088011, 16169191, 101808101, 616101919, 668808899, 686808989, 1016969101, 1106699011, 1199006611, 6068888909, 6699116699, 6699886699, 11990006611, 16168089191, 19190006161, 19198086161, 66110001199, 66880008899, 110668899011, 161600009191

Offset: 1

Author

G. L. Honaker, Jr. and Giovanni Resta, Jul 08 2016

Keywords

• nonn
• base

Comments

The smallest term which is the product of 3 primes is 1111008888001111 = 11 * 101 * 1000008000001. The smallest term which is not a multiple of 11 or 101 is a(790) = 100111801888108111001 = 100111001 * 1000008000001.

Examples

			16169191 is a term because it is equal to 101 * 160091.
		

Links

• Giovanni Resta, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000787, A007597.