A186038 a(n) = log_3(A002426(n)/numerator(A002426(n)/3^n)).

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

G. C. Greubel, Table of n, a(n) for n = 0..1000

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: A344833 A233286 A305802 * A091009 A204814 A174903

Adjacent sequences: A186035 A186036 A186037 * A186039 A186040 A186041

Keyword

nonn,easy

Author

Paul Barry, Feb 11 2011

Status

approved