A216129 a(n) = 7^n mod 1000.

1, 7, 49, 343, 401, 807, 649, 543, 801, 607, 249, 743, 201, 407, 849, 943, 601, 207, 449, 143, 1, 7, 49, 343, 401, 807, 649, 543, 801, 607, 249, 743, 201, 407, 849, 943, 601, 207, 449, 143, 1, 7, 49, 343, 401, 807, 649, 543, 801, 607, 249, 743, 201, 407, 849, 943, 601, 207, 449, 143, 1

Offset

0,2

Comments

Period = 20.

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Mathematica

PowerMod[7, Range[0, 100], 1000] (* Vincenzo Librandi, Aug 16 2016 *)

Prog

(PARI) for(i=0, 100, print(7^i%1000" "))
(Magma) [Modexp(7, n, 1000): n in [0..110]]; // Vincenzo Librandi, Aug 16 2016

Crossrefs

Cf. A001903, A014390.

Sequence in context: A250349 A171281 A328086 * A057266 A057833 A014949

Adjacent sequences: A216126 A216127 A216128 * A216130 A216131 A216132

Keyword

nonn,easy

Author

V. Raman, Sep 01 2012

Extensions

a(0) = 1 prepended and offset changed by Vincenzo Librandi, Aug 16 2016

Status

approved