A178917 Pairs prime(k), prime(k+1) such that last digit of prime(k) is 9 and last digit of prime(k+1) is 7.

89, 97, 359, 367, 389, 397, 449, 457, 479, 487, 719, 727, 929, 937, 1069, 1087, 1109, 1117, 1259, 1277, 1439, 1447, 1559, 1567, 1759, 1777, 1979, 1987, 2459, 2467, 2609, 2617, 2699, 2707, 2879, 2887, 2909, 2917, 3209, 3217, 3449, 3457, 3719, 3727

Offset

1,1

Links

Table of n, a(n) for n=1..44.

Prog

(Magma) &cat[ [p, q]: p in PrimesUpTo(4000) | P[1] eq 9 and Q[1] eq 7 where P is Intseq(p) where Q is Intseq(q) where q is NextPrime(p) ]; // Klaus Brockhaus, Jan 01 2011

Crossrefs

Sequence in context: A088993 A107202 A260807 * A159026 A256240 A090062

Adjacent sequences: A178914 A178915 A178916 * A178918 A178919 A178920

Keyword

nonn,base,less

Author

Vincenzo Librandi, Dec 29 2010

Extensions

Corrected (2789, 2857 removed) by Klaus Brockhaus, Jan 01 2011

Status

approved