A161915 Digital root of Ramanujan primes (A104272).

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

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: A208133 A046644 A343059 * A342818 A174354 A011147

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