A146110 - OEIS

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A146110

Bell numbers (A000110) read mod 20.

1, 1, 2, 5, 15, 12, 3, 17, 0, 7, 15, 10, 17, 17, 2, 5, 7, 4, 19, 17, 12, 11, 3, 6, 9, 13, 14, 9, 15, 12, 7, 13, 4, 7, 19, 10, 17, 1, 6, 9, 7, 8, 7, 5, 16, 15, 15, 2, 1, 1, 10, 17, 3, 12, 11, 17, 0, 15, 3, 18, 17, 5, 18, 1, 15, 12, 3, 9, 16, 7, 15, 2, 5, 13, 2, 17, 7, 8, 15, 9, 4, 15, 3, 14, 13, 9, 18

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..10000

W. F. Lunnon, P. A. B. Pleasants, and N. M. Stephens, Arithmetic properties of Bell numbers to a composite modulus I, Acta Arithmetica 35 (1979), pp. 1-16.

FORMULA

a(n+9372) = a(n). - G. C. Greubel, Feb 01 2016

MATHEMATICA

Mod[BellB[Range[0, 90]], 20] (* Harvey P. Dale, May 12 2012 *)

PROG

(Magma) [Bell(n) mod 20: n in [0..100]]; // Vincenzo Librandi, Feb 02 2016