

A088143


Find the shortest prefix of Pi3 = .141592653589793238462643383279502.. which is divisible by n and divide by n.


1



1, 7, 47, 35398, 283, 23598775598298873, 2, 17699, 15732517, 1415926535897932384626433832795, 12872, 117993877991494365385536152732919, 1089174258383, 1, 943951, 88495408493620774, 8328979622929, 7866258532766291, 7452244925778591498
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OFFSET

1,2


COMMENTS

a(152) has 1218 digits, so is too large for a bfile.  Robert Israel, Sep 19 2019


LINKS

Robert Israel, Table of n, a(n) for n = 1..151


EXAMPLE

1/1 = 1, 14/2 = 7, 141/3 = 47, 141592/4 = 35398, 1415/5 = 283,...


MAPLE

F:= floor((Pi3)*10^10000):
Prefs:= [seq(floor(F/10^(10000i)), i=1..10000)]:
f:= proc(n) local i;
for i from 1 to nops(Prefs) do if Prefs[i] mod n = 0 then return Prefs[i]/n fi od:
FAIL
end proc:
map(f, [$1..151]); # Robert Israel, Sep 19 2019


CROSSREFS

Cf. A000796.
Sequence in context: A020465 A092480 A292067 * A124880 A227100 A240334
Adjacent sequences: A088140 A088141 A088142 * A088144 A088145 A088146


KEYWORD

base,nonn


AUTHOR

N. J. A. Sloane, Nov 03 2003


EXTENSIONS

Corrected and extended by Ray Chandler and Vladeta Jovovic, Nov 06 2003
Name corrected by Robert Israel, Sep 19 2019


STATUS

approved



