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A176507
Indices of products of 2 single (or isolated or non-twin) primes in the composites.
0
1, 31, 52, 69, 78, 101, 120, 127, 137, 149, 177, 199, 206, 248, 259, 266, 277, 339, 359, 375, 406, 416, 426, 429, 452, 479, 501, 518, 540, 551, 579, 590, 603, 613, 623, 630, 640, 655, 662, 676, 704, 726, 732, 743, 757, 775, 795, 809, 816, 829, 837, 847, 900
OFFSET
1,2
FORMULA
A002808(k)=A176312(a(n)).
CROSSREFS
Sequence in context: A068779 A068473 A275628 * A163321 A182380 A141856
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected (553 replaced by 551) by R. J. Mathar, May 02 2010
STATUS
approved