1,1

Cf. A045536: Primes p such that 1*p+2 and 2*p+1 are primes.

Select[Prime[Range[220]], PrimeQ[4#+1]&&PrimeQ[1#+4]&]

Cf. A045536.

Sequence in context: A023212 A106952 A106951 this_sequence A049492 A051842 A062605

Adjacent sequences: A106054 A106055 A106056 this_sequence A106058 A106059 A106060

nonn

Zak Seidov (zakseidov(AT)yahoo.com), May 07 2005