A111388 - OEIS

A111388

a(n) = floor(log(A111288(n))).

0, 0, 0, 0, 0, 1, 1, 2, 3, 5, 8, 12, 17, 26, 38, 56, 82, 120, 176, 258, 379, 556, 815, 1194, 1751, 2566, 3761, 5512, 8079, 11840, 17353, 25432, 37272, 54625, 80057, 117330, 171955, 252013, 369343, 541298, 793311, 1162654, 1703953, 2497265, 3659920

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OFFSET

1,8

COMMENTS

The sequence A111288 grows very rapidly, as evidenced here, so it makes more sense to take the log of these terms.

LINKS

Table of n, a(n) for n=1..45.

MATHEMATICA

l = {1, 1, 1, 1}; For[n = 5, n <= 50, n++, k = l[[n-1]]*l[[n-3]] + l[[n-2]]*l[[n-4]]; AppendTo[l, k]]; Print[Map[Floor, Map[Log, l]]]

CROSSREFS

Sequence in context: A200661 A175539 A260795 * A127884 A105858 A372040

Adjacent sequences: A111385 A111386 A111387 * A111389 A111390 A111391

KEYWORD

nonn

AUTHOR

Ryan Propper, Nov 09 2005

STATUS

approved