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A174891
Row indices for nonzero elements in first column of A174888.
2
1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 32, 33, 34, 35, 36, 38, 39, 40, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 68, 69, 72, 74, 75, 76, 77
OFFSET
1,2
COMMENTS
Compare with nonprimes A018252. 30 is not a member of this sequence. Neither is 42.
CROSSREFS
KEYWORD
nonn
AUTHOR
Mats Granvik, Apr 01 2010
STATUS
approved