A179474 a(n) = position of A045392(n) in A042997.

1, 8, 10, 18, 24, 29, 32, 37, 43, 56, 57, 61, 63, 67, 73, 74, 79, 84, 87, 100, 105, 110, 118, 125, 126, 130, 134, 143, 150, 157, 160, 165, 175, 177, 184, 185, 187, 188, 193, 200, 205, 215, 230, 233, 235, 242, 248, 256, 258, 261, 262, 265, 272, 276, 278, 279, 290

Offset

1,2

Comments

Positions of primes congruent to {2} mod 7 among primes congruent to {2,3,4,5,6} mod 7.

Links

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

Mathematica

pr=Prime[Range[500]]; A042997=Select[pr, 1<Mod[ #, 7]&];
A045392=Select[A042997, 2==Mod[ #, 7]&];
s=Flatten[Position[A042997, # ]&/@A045392]

Crossrefs

Cf. A042997 Primes congruent to {2, 3, 4, 5, 6} mod 7, A045392 Primes congruent to {2} mod 7.

Sequence in context: A299988 A143617 A015732 * A373727 A153382 A157911

Adjacent sequences: A179471 A179472 A179473 * A179475 A179476 A179477

Keyword

nonn

Author

Zak Seidov, Jul 16 2010

Status

approved