A102387 a(n) is the smallest number m such that 2^m contains the first n decimal digits of Pi.

5, 17, 74, 144, 144, 2003, 2003, 37929, 82810, 161449, 712201, 2401519, 7339199, 33662541

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Formula

a(n) = A030000(A011545(n)).

Example

The first number is 5 because 2^5 is 32, which contains 3, the first digit of Pi.

Crossrefs

Cf. A030000, A011545.

Sequence in context: A149722 A166228 A362177 * A149723 A149724 A149725

Adjacent sequences: A102384 A102385 A102386 * A102388 A102389 A102390

Keyword

base,nonn

Author

Sergei Bernstein (sergeibernstein(AT)gmail.com), Feb 22 2005

Extensions

a(11)-a(14) from Giovanni Resta, Nov 14 2013

Status

approved