1,1

Table of n, a(n) for n=1..6.

3^1 + 20 = 23, 3^2 + 20 = 29.

(PARI) g(m, n, b) = { for(x=0, n, y=m+b^x+b%2; z=m+b^(x+1)+b%2; if(isprime(y)&isprime(z), print1(y", ") ) ) }

Cf. A108258.

Sequence in context: A108111 A085713 A102904 * A232725 A045120 A174260

Adjacent sequences: A108246 A108247 A108248 * A108250 A108251 A108252

nonn

Cino Hilliard, Jun 29 2005

approved