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

1,2

LINKS

Table of n, a(n) for n=1..53.

FORMULA

A002808(k)=A176312(a(n)).

CROSSREFS

Sequence in context: A068779 A068473 A275628 * A163321 A182380 A141856

Adjacent sequences:  A176504 A176505 A176506 * A176508 A176509 A176510

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Apr 19 2010

EXTENSIONS

Corrected (553 replaced by 551) by R. J. Mathar, May 02 2010

STATUS

approved

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Last modified August 24 22:39 EDT 2019. Contains 326314 sequences. (Running on oeis4.)