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A133762 Odd composite numbers such that the sum of any two terms, plus 1, is a prime. 0

%I

%S 9,21,49,51,57,141,1011,2661,21471,64869,357561,1750989,5409570201,

%T 107563623099,657637783581

%N Odd composite numbers such that the sum of any two terms, plus 1, is a prime.

%e 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.

%K more,nonn

%O 1,1

%A _Randy L. Ekl_, Jan 01 2008

%E 3 more terms from _Donovan Johnson_, Mar 06 2008

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Last modified September 17 19:58 EDT 2021. Contains 347489 sequences. (Running on oeis4.)