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

1,1

LINKS

Table of n, a(n) for n=1..85.

MATHEMATICA

Table[ Mod[ -Prime[n], 20], {n, 1, 85} ]

CROSSREFS

Sequence in context: A079293 A070646 A094381 * A118511 A022974 A023460

Adjacent sequences:  A074969 A074970 A074971 * A074973 A074974 A074975

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Oct 05 2002

EXTENSIONS

Edited and extended by Robert G. Wilson v, Oct 07 2002

STATUS

approved

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Last modified March 28 14:58 EDT 2020. Contains 333089 sequences. (Running on oeis4.)