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A087357 Index of powers of 2 arising as the difference of a pair of successive terms of A087356. 1
1, 3, 2, 13, 6, 11, 4, 5, 10, 35, 16, 25, 26, 19, 12, 501, 2594, 1219 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: Every number is a member.

a(17) > 2500. - David Wasserman, May 12 2005

a(19) > 20000 if it exists. - Robert Israel, Dec 24 2015

LINKS

Table of n, a(n) for n=1..18.

FORMULA

a(n) = Log th the base 2 of {A087356(n+1) - A087356(n)}.

EXAMPLE

a(5) = log to the base 2 of {A087356(6) - A087356(5)} = log{8209-17} = log (8192) to the base 2 = 13.

CROSSREFS

Cf. A087356.

Sequence in context: A075555 A075556 A257568 * A226062 A245610 A191705

Adjacent sequences:  A087354 A087355 A087356 * A087358 A087359 A087360

KEYWORD

nonn,more

AUTHOR

Amarnath Murthy, Sep 08 2003

EXTENSIONS

More terms from David Wasserman, May 12 2005

a(17) and a(18) from Robert Israel, Dec 24 2015

STATUS

approved

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Last modified August 13 22:53 EDT 2020. Contains 336473 sequences. (Running on oeis4.)