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A186038
a(n) = log_3(A002426(n)/numerator(A002426(n)/3^n)).
2
0, 0, 1, 0, 0, 1, 1, 1, 3, 0, 0, 1, 0, 0, 1, 2, 2, 4, 1, 1, 2, 1, 1, 2, 2, 2, 5, 0, 0, 1, 0, 0, 1, 1, 1, 3, 0, 0, 1, 0, 0, 1, 5, 3, 4, 2, 2, 3, 2, 2, 3, 3, 3, 6, 1, 1, 2, 1, 1, 2, 2, 2, 4, 1, 1, 2, 1, 1, 2, 3, 3, 6, 2, 2, 3, 2, 2, 3, 3, 3, 7
OFFSET
0,9
COMMENTS
(-1)^a(n) = A186039(n).
LINKS
MAPLE
A186038 := proc(n)
local m, ml ;
m := A002426(n) ;
ml := %/3^n ;
m/numer(ml) ;
ilog[3](%) ;
end proc: # R. J. Mathar, Feb 13 2015
MATHEMATICA
b[n_] := If[n < 0, 0, 3^n Hypergeometric2F1[1/2, -n, 1, 4/3]];
a[n_] := Log[3, b[n]/Numerator[b[n]/3^n]]; Table[a[n], {n, 0, 50}] (* G. C. Greubel, Feb 27 2017 *)
CROSSREFS
Sequence in context: A233286 A305802 A375483 * A091009 A204814 A174903
KEYWORD
nonn,easy
AUTHOR
Paul Barry, Feb 11 2011
STATUS
approved