A073303 Indices of prime digits in the decimal expansion of Pi.

0, 4, 6, 8, 9, 10, 13, 15, 16, 17, 21, 24, 25, 27, 28, 29, 31, 33, 39, 43, 46, 47, 48, 51, 53, 56, 61, 63, 64, 66, 73, 76, 83, 86, 89, 90, 91, 93, 96, 99, 102, 109, 111, 112, 114, 115, 120, 123, 130, 131, 133, 135, 136, 137, 139, 140, 141, 142, 143, 149, 156

Offset

0,2

Links

Harvey P. Dale, Table of n, a(n) for n = 0..10000

Example

Pi=3.141592653, so the indices of prime digits are 0,4,6,8,9...

Mathematica

Flatten[Position[RealDigits[Pi, 10, 200][[1]], _?PrimeQ]]-1 (* Harvey P. Dale, Oct 01 2013 *)

Crossrefs

Cf. A000796, A073264.

Sequence in context: A173328 A116661 A109104 * A104211 A132858 A071941

Adjacent sequences: A073300 A073301 A073302 * A073304 A073305 A073306

Keyword

easy,nonn,base

Author

Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 22 2002

Extensions

More terms from Harvey P. Dale, Oct 01 2013

Status

approved