A088143 Find the shortest prefix of Pi-3 = .141592653589793238462643383279502.. which is divisible by n and divide by n.

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

Offset

1,2

Comments

a(152) has 1218 digits, so is too large for a b-file. - 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((Pi-3)*10^10000):
Prefs:= [seq(floor(F/10^(10000-i)), 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: A092480 A354211 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