A266242 Numbers n such that the initial digit of the fractional part of n*Pi is 0.

0, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99, 106, 149, 156, 163, 170, 177, 184, 191, 198, 205, 212, 219, 262, 269, 276, 283, 290, 297, 304, 311, 318, 325, 332, 375, 382, 389, 396, 403, 410, 417, 424, 431, 438, 445, 488, 495, 502, 509, 516, 523, 530, 537

Offset

1,2

Comments

Because 22/7 is so close to Pi, a(n+1) - a(n) is very often 7.

n for which A145951(n) = 0.

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Example

36*Pi = 113.09... so 36 is in the sequence.

Maple

select(t -> floor(10*t*Pi) mod 10 = 0, [$0..1000]);

Prog

(PARI) for(n=0, 1e3, if(floor(10*n*Pi) % 10 == 0, print1(n", "))); \\ Altug Alkan, Dec 25 2015

Crossrefs

Cf. A145951.

Sequence in context: A078299 A225028 A239802 * A274241 A062519 A138566

Adjacent sequences: A266239 A266240 A266241 * A266243 A266244 A266245

Keyword

nonn,base

Author

Robert Israel, Dec 25 2015

Status

approved