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A161915 Digital root of Ramanujan primes (A104272). 0
2, 2, 8, 2, 5, 2, 5, 4, 8, 7, 2, 8, 1, 5, 7, 5, 8, 1, 2, 4, 8, 5, 7, 2, 8, 2, 1, 5, 5, 7, 7, 4, 5, 4, 5, 8, 1, 7, 2, 1, 5, 8, 2, 4, 2, 8, 5, 7, 4, 2, 4, 8, 5, 2, 2, 8, 7, 1, 4, 4, 8, 2, 4, 8, 7, 2, 8, 1, 5, 2, 4, 2, 1, 2, 4, 5, 5, 7, 8, 1, 7, 2, 8, 5, 8, 2, 8, 2, 5, 7, 8, 2, 1, 5, 8, 5, 1, 5, 7, 8, 7, 2, 5, 2, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

Eric W. Weisstein, Ramanujan Prime

EXAMPLE

659 is a Ramanujan's prime whose digital root is 2.

CROSSREFS

A104272

Sequence in context: A325753 A208133 A046644 * A174354 A011147 A273168

Adjacent sequences:  A161912 A161913 A161914 * A161916 A161917 A161918

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi, Jun 22 2009

EXTENSIONS

a(53) corrected by R. J. Mathar, Jul 08 2009

STATUS

approved

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Last modified October 15 15:14 EDT 2019. Contains 328030 sequences. (Running on oeis4.)