Voozh

A090955

Numbers in increasing order such that successive sum and difference both are primes: a(n) + a(n-1) and a(n) - a(n-1) both are primes.

1, 4, 7, 10, 13, 16, 21, 26, 33, 38, 41, 48, 53, 56, 75, 82, 85, 88, 91, 102, 109, 114, 119, 122, 129, 134, 137, 140, 143, 150, 157, 160, 171, 176, 183, 190, 193, 196, 201, 208, 211, 222, 227, 230, 233, 246, 253, 256, 267, 274, 297, 302, 305, 308, 311, 330, 343

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..57.

MATHEMATICA

a = 1; Print[a]; Do[k = a + 1; While[ !(PrimeQ[k - a] && PrimeQ[k + a]), k++ ]; a = k; Print[a], {n, 1, 100}] (* Ryan Propper, Aug 27 2005 *)

CROSSREFS

Cf. A090956.

Sequence in context: A310682 A090852 A182112 * A310683 A134027 A143455

Adjacent sequences: A090952 A090953 A090954 * A090956 A090957 A090958

KEYWORD