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A323627 For any nonnegative real number x, let f(x) be the real number obtained by replacing in the binary expansions of the integer and fractional parts of x each finite run of k consecutive equals bits b by a run of k-(-1)^k consecutive bits b; a(n) is the denominator of f(1/n). 2
1, 4, 5, 16, 3, 5, 7, 8, 17, 24, 257, 20, 129, 56, 21, 64, 9, 17, 1025, 12, 15, 257, 2047, 10, 8193, 129, 1025, 28, 10923, 21, 31, 32, 65, 72, 87381, 68, 2097153, 8200, 16383, 96, 2049, 120, 1025, 1028, 5461, 16376, 536870911, 80, 33554431, 65544, 1365, 516 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..52.

Rémy Sigrist, PARI program for A323627

FORMULA

a(2^k) = 2^(k+1+(-1)^k) for any k >= 2.

PROG

(PARI) See Links section.

CROSSREFS

See A323626 for the corresponding numerators and additional comments.

Sequence in context: A050226 A119562 A289021 * A289742 A249113 A166590

Adjacent sequences:  A323624 A323625 A323626 * A323628 A323629 A323630

KEYWORD

nonn,frac,base

AUTHOR

Rémy Sigrist, Jan 20 2019

STATUS

approved

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Last modified October 17 04:09 EDT 2019. Contains 328106 sequences. (Running on oeis4.)