1,2

M. Keith, Integers Containing Many Embedded Primes

W. Schneider, MATHEWS, Primeval Numbers

We have a(3)=11, since amongst numbers 100 through 999, the smallest ones having 5, 6, 7, 8, 10, 11 embedded primes are respectively 107, 127, 113, 167, 179, 137, (the latter being the first reaching the maximum number of 11 embedded primes, viz. 3, 7, 13, 17, 31, 37, 71, 73, 137, 173, 317).

Cf. A072857, A076449.

Sequence in context: A004080 A027115 A077995 this_sequence A084757 A027153 A034754

Adjacent sequences: A076727 A076728 A076729 this_sequence A076731 A076732 A076733

hard,more,base,nonn

Lekraj Beedassy (blekraj(AT)yahoo.com), Nov 08 2002