A175803 a(n) = 2^(prime(n)-2) mod prime(n+2).

1, 2, 8, 6, 2, 15, 16, 21, 2, 6, 20, 42, 18, 39, 13, 28, 53, 58, 4, 52, 43, 1, 70, 46, 33, 51, 23, 98, 4, 126, 39, 60, 99, 4, 23, 66, 19, 105, 98, 35, 100, 101, 177, 14, 67, 82, 83, 34, 71, 58, 233, 171, 129, 27, 86, 9, 244, 170, 241, 122, 108, 252, 291, 265, 62, 1, 299, 55, 262, 254, 7, 353, 122, 72, 34, 269, 7, 375, 250, 24

Offset

1,2

Links

Table of n, a(n) for n=1..80.

Formula

a(n) = 2^(A000040(n)-2) mod A000040(n+2).

Example

a(4) = 2^(prime(4)-2) mod prime(4+2) = 2^(7-2) mod 13 = 6.

Maple

A175803 := proc(n) 2^(ithprime(n)-2) mod ithprime(n+2) ; end proc: # R. J. Mathar, Dec 05 2010

Crossrefs

Cf. A000040.

Sequence in context: A019771 A264643 A016594 * A019986 A146943 A028352

Adjacent sequences: A175800 A175801 A175802 * A175804 A175805 A175806

Keyword

nonn

Author

Juri-Stepan Gerasimov, Dec 04 2010

Extensions

Terms corrected by R. J. Mathar, Dec 05 2010

Status

approved