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A178708 Position of start of first appearance of n consecutive 0's in the binary expansion of Pi. 1
1, 1, 7, 7, 96, 96, 96, 189, 902, 902, 4267, 8375, 8375, 8375, 11791, 11791, 112954, 436893, 726844, 726844, 2005750, 2005750, 2005750, 42248747, 171498580, 171498580, 171498580 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

In the first 2^28 binary digits, 134220460 are "0" and 134214996 are "1". - Robert G. Wilson v, Jun 09 2010

This sequence ignores bits in the integer part of the binary expansion of Pi.

LINKS

Table of n, a(n) for n=1..27.

EXAMPLE

3 consecutive 0's are first found beginning at the 7th position in Pi's binary expansion, so the third term in this sequence is 7.

MATHEMATICA

pib = ToString@ FromDigits[ RealDigits[Pi - 3, 2, 2^26][[1]]]; f[n_] := 3 + StringPosition[ pib, ToString[10^n], 1][[1, 1]]; f[1] = f[2] = 1; Array[f, 27] (* Robert G. Wilson v, Jun 09 2010 *)

CROSSREFS

Cf. A004601, A050279.

Cf. A178709. - Robert G. Wilson v, Jun 09 2010

Sequence in context: A269902 A269937 A065240 * A072399 A001988 A099739

Adjacent sequences:  A178705 A178706 A178707 * A178709 A178710 A178711

KEYWORD

base,nonn

AUTHOR

Will Nicholes, Jun 06 2010

EXTENSIONS

a(17)-a(27) from Robert G. Wilson v, Jun 09 2010

STATUS

approved

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Last modified September 26 05:09 EDT 2017. Contains 292502 sequences.