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A100022 Number of digits in A090162(n). 1
1, 4, 29, 205, 1412, 9688, 66416, 455237, 3120256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

FORMULA

a(n+1)/a(n) -> Phi^4 = 6.8541... - Robert G. Wilson v, Nov 23 2004

MATHEMATICA

f[n_] := Floor[ Log[10, Binomial[ Fibonacci[2n]Fibonacci[2n + 1], Fibonacci[2n - 1]Fibonacci[2n] - 1]] + 1]; Do[ Print[ f[n]], {n, 9}] (* Robert G. Wilson v, Nov 23 2004 *)

CROSSREFS

Sequence in context: A129587 A143551 A288913 * A001883 A281600 A135429

Adjacent sequences:  A100019 A100020 A100021 * A100023 A100024 A100025

KEYWORD

nonn,base

AUTHOR

Eric W. Weisstein, Nov 23 2003 and Wolfdieter Lang, Dec 01 2003

EXTENSIONS

a(7)-a(9) from Robert G. Wilson v, Nov 23 2004

STATUS

approved

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Last modified September 23 22:32 EDT 2020. Contains 337315 sequences. (Running on oeis4.)