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A131493 Values of n such that Pi^n starts with the digits n. 0
3, 226, 1837, 2163, 5358, 44857, 170788, 482721, 8918391, 36589396, 122394502, 1107852077, 10071260304, 22991513047, 81477190549, 422242473309, 4242315932866, 153777057499935, 282960008506695, 1683262946768556, 1099372130016731506, 1117679864051418714 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

226 is a term of this sequence because Pi^226 = 226.9191... * 10^110, which starts with 226.

PROG

(PARI) s=1; for(i=1, 10000000, s=s*Pi; if(s-i>11, s=s/10, ); if(floor(s)==i, printp1(i, ", "), ))

CROSSREFS

Cf. A100129, A131494

Sequence in context: A157582 A241098 A254157 * A228871 A195500 A099426

Adjacent sequences:  A131490 A131491 A131492 * A131494 A131495 A131496

KEYWORD

nonn,base

AUTHOR

Randy L. Ekl, Aug 12 2007

EXTENSIONS

a(10)-a(12) from Jon E. Schoenfield, Jul 17 2010

a(13)-a(22) from Max Alekseyev, Sep 12 2013

STATUS

approved

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Last modified July 26 10:21 EDT 2021. Contains 346294 sequences. (Running on oeis4.)