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A138786
"Left" odd composite numbers n for which n < A140607((n-1)/2).
4
9, 21, 25, 27, 35, 45, 49, 55, 69, 75, 77, 81, 93, 95, 99, 105, 115, 119, 121, 125, 133, 135, 141, 143, 147, 153, 155, 161, 165, 169, 175, 187, 189, 203, 207, 209, 213, 215, 217, 219, 221, 225, 231, 235, 237, 243, 245, 247, 253, 259, 261, 267, 279, 285, 287
OFFSET
1,1
COMMENTS
There are odd composite numbers which are neither in this sequence nor in A140608. The first such number is 91, see A140667.
LINKS
KEYWORD
nonn
AUTHOR
Vladimir Shevelev, May 18 2008
EXTENSIONS
Extended by Ray Chandler, May 20 2008
STATUS
approved