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A133762
Odd composite numbers such that the sum of any two terms, plus 1, is a prime.
0
9, 21, 49, 51, 57, 141, 1011, 2661, 21471, 64869, 357561, 1750989, 5409570201, 107563623099, 657637783581
OFFSET
1,1
EXAMPLE
49 is a term in the sequence because 49 is an odd composite, 49+9+1=59 and 49+21+1=71, are both primes.
CROSSREFS
Sequence in context: A173391 A259243 A241747 * A160414 A256530 A363634
KEYWORD
more,nonn
AUTHOR
Randy L. Ekl, Jan 01 2008
EXTENSIONS
3 more terms from Donovan Johnson, Mar 06 2008
STATUS
approved