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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
OFFSET
1,1
EXAMPLE
659 is a Ramanujan's prime whose digital root is 2.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Jun 22 2009
EXTENSIONS
a(53) corrected by R. J. Mathar, Jul 08 2009
STATUS
approved