A174620 a(n) = 2^A141468(n) mod prime(n), where A141468(n) is the n-th nonnegative nonprime.

1, 2, 1, 1, 3, 5, 4, 11, 8, 27, 2, 36, 1, 42, 24, 13, 11, 19, 45, 5, 8, 50, 71, 2, 86, 78, 15, 74, 16, 112, 4, 68, 14, 106, 66, 32, 79, 26, 25, 18, 76, 6, 78, 150, 163, 63, 69, 98, 189, 17, 184, 40, 1, 125, 249, 187, 229, 69, 169, 81, 264, 172, 18, 209, 114, 277, 1, 128, 46, 21

Offset

1,2

Links

Table of n, a(n) for n=1..70.

Example

a(14)=12 because (2^A141468(14) mod prime(14)) = (2097152 mod 43) = 12.

Prog

(PARI) c=-1; forprime(p=1, 999, while(isprime(c++), ); print1(lift( Mod(2, p)^c )", ")) \\ M. F. Hasler, Nov 29 2010

Crossrefs

Cf. A000040, A000079, A141468.

Sequence in context: A287030 A187066 A187065 * A210098 A241188 A145236

Adjacent sequences: A174617 A174618 A174619 * A174621 A174622 A174623

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 29 2010

Status

approved