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

Author

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

Keywords

• easy
• nonn
• base

Examples

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

Links

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

Crossrefs

Cf. A000796, A073264.

Programs

Mathematica

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

Extensions

More terms from Harvey P. Dale, Oct 01 2013