A274831 - OEIS

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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 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	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.`
	LINKS	`Giovanni Resta, Table of n, a(n) for n = 1..1000`
	EXAMPLE	`16169191 is a term because it is equal to 101 * 160091.`
	CROSSREFS	`Cf. A000787, A007597.` `Sequence in context: A225238 A275944 A015292 * A154805 A203897 A236050` `Adjacent sequences: A274828 A274829 A274830 * A274832 A274833 A274834`
	KEYWORD	`nonn,base`
	AUTHOR	`G. L. Honaker, Jr. and Giovanni Resta, Jul 08 2016`
	STATUS	`approved`

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Last modified November 18 21:51 EST 2017. Contains 294912 sequences.