A320300 - OEIS

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A320300

Positions of 0's in binary expansion of Pi/4.

4

3, 4, 6, 7, 9, 10, 11, 12, 19, 22, 24, 26, 28, 29, 30, 32, 33, 34, 36, 37, 38, 39, 41, 44, 46, 47, 48, 51, 52, 53, 54, 56, 57, 58, 61, 63, 64, 67, 68, 69, 71, 72, 75, 76, 77, 80, 81, 84, 85, 86, 88, 90, 91, 92, 94, 98, 99, 100, 101, 102, 103, 104, 107, 111, 112, 113, 114, 115, 119, 120, 123, 125, 126, 127, 129, 130, 132, 134, 135, 137

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Numbers not in A004711.

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A354482(n) + 2. - Amiram Eldar, Mar 13 2026

MATHEMATICA

Flatten[Position[RealDigits[Pi/4, 2, 200][[1]], 0]] (* Alonso del Arte, Oct 11 2018, after Harvey P. Dale *)

PROG

(PARI) default(realprecision, 100); v = select(x->(x==0), binary(Pi/4)[2], 1) \\ Michel Marcus, Oct 12 2018

CROSSREFS

Cf. A004601, A004711, A320301, A320302, A354482.

Sequence in context: A275672 A087753 A233334 * A070762 A061208 A325439

Adjacent sequences: A320297 A320298 A320299 * A320301 A320302 A320303

KEYWORD

nonn,base

AUTHOR

Jack Zhang, Oct 10 2018

STATUS

approved