A100022 Number of digits in A090162(n).

1, 4, 29, 205, 1412, 9688, 66416, 455237, 3120256

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,more

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