1,1

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.

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

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

Cf. A000787, A007597.

Sequence in context: A225238 A275944 A015292 * A154805 A203897 A236050

Adjacent sequences: A274828 A274829 A274830 * A274832 A274833 A274834

nonn,base

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

approved