A065991 The first n base-4 digits of Pi expressed in decimal forms a prime.

1, 62, 3253

Offset

1,2

Links

Table of n, a(n) for n=1..3.

Example

The first 62 quaternary digits of Pi (A004603) are 30210033312222020201122030020310301030121202202320003130013031 = 16703571626015105435307505830654230989 in decimal, which is a prime.

Mathematica

Do[ If[ PrimeQ[ FromDigits[ First[ RealDigits[Pi, 4, n]], 4]], Print[n]], {n, 1, 4000} ]

Crossrefs

Cf. A004603.

Sequence in context: A092709 A308436 A137219 * A206833 A206841 A206895

Adjacent sequences: A065988 A065989 A065990 * A065992 A065993 A065994

Keyword

base,nonn,bref

Author

Robert G. Wilson v, Dec 10 2001

Status

approved