A088071 Number sandwiched between two numbers having only one prime divisor.

3, 4, 6, 8, 10, 12, 18, 24, 26, 28, 30, 42, 48, 60, 72, 80, 82, 102, 108, 126, 138, 150, 168, 180, 192, 198, 228, 240, 242, 270, 282, 312, 348, 360, 420, 432, 462, 522, 570, 600, 618, 642, 660, 728, 810, 822, 828, 840, 858, 882, 1020, 1032, 1050, 1062, 1092, 1152

Offset: 1

Author

Amarnath Murthy, Sep 22 2003

Keywords

• nonn

Comments

A014574 (average of twin prime pairs) is a subsequence.

Crossrefs

Cf. A014574, A088072.

Programs

PARI

for(n=2,1200,if(matsize(factor(n-1))[1]*matsize(factor(n+1))[1]==1,print1(n,",")))

Extensions

Edited and extended by Klaus Brockhaus, Sep 25 2003