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A146093
Bell numbers (A000110) read mod 3.
5
1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1
OFFSET
0,3
LINKS
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+13) = a(n). - G. C. Greubel, Jan 30 2016
MATHEMATICA
Mod[BellB[Range[0, 110]], 3] (* Harvey P. Dale, Oct 31 2013 *)
PROG
(Magma) [Bell(n) mod 3: n in [0..100]]; // Vincenzo Librandi, Jan 30 2016
CROSSREFS
Cf. A000110, A146094-A146122. A054767 gives periods. See also A002034.
Sequence in context: A249371 A122190 A237291 * A091269 A287455 A216789
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 07 2009
STATUS
approved