A108119 Numbers k such that prime(k) and prime(k+1) are congruent to 1 (mod 10).

42, 53, 82, 115, 125, 141, 172, 177, 193, 233, 279, 369, 399, 431, 474, 500, 575, 580, 585, 650, 651, 672, 708, 737, 751, 760, 795, 798, 820, 841, 842, 863, 873, 933, 1019, 1031, 1099, 1112, 1166, 1178, 1225, 1245, 1266, 1312, 1352, 1436, 1463, 1479, 1505

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Example

Prime(42)=181, prime(43)=191. This is the first pair of successive primes both ending with 1.

Mathematica

ra=Range[2000]; cnd=Mod[Prime[ # ], 10]==Mod[Prime[ #+1], 10]==1&; se=Select[ra, cnd]

Crossrefs

Sequence in context: A186456 A181647 A105346 * A175103 A116262 A156394

Adjacent sequences: A108116 A108117 A108118 * A108120 A108121 A108122

Keyword

nonn

Author

Zak Seidov, Jun 04 2005

Status

approved