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A074972
a(n) == - prime(n) (modulo 20).
0
18, 17, 15, 13, 9, 7, 3, 1, 17, 11, 9, 3, 19, 17, 13, 7, 1, 19, 13, 9, 7, 1, 17, 11, 3, 19, 17, 13, 11, 7, 13, 9, 3, 1, 11, 9, 3, 17, 13, 7, 1, 19, 9, 7, 3, 1, 9, 17, 13, 11, 7, 1, 19, 9, 3, 17, 11, 9, 3, 19, 17, 7, 13, 9, 7, 3, 9, 3, 13, 11, 7, 1, 13, 7, 1, 17, 11, 3, 19, 11, 1, 19, 9, 7, 1
OFFSET
1,1
MATHEMATICA
Table[ Mod[ -Prime[n], 20], {n, 1, 85} ]
CROSSREFS
Sequence in context: A375676 A094381 A375675 * A118511 A022974 A023460
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Oct 05 2002
EXTENSIONS
Edited and extended by Robert G. Wilson v, Oct 07 2002
STATUS
approved