A135760 Least number in A001764 divisible by 3^n: a(n) = A001764(3^n-1).
1, 3, 43263, 6568517413771094628, 748787983804424579516665098357127267955239740580277791815018327
Offset: 0
Keywords
Programs
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Mathematica
Table[Binomial[3^(n + 1) - 3, 3^n - 1]/(2*3^n - 1), {n,0,10}] (* G. C. Greubel, Nov 07 2016 *) -
PARI
a(n)=binomial(3^(n+1)-3,3^n-1)/(2*3^n-1)
Formula
a(n) = C(3^(n+1)-3, 3^n-1) / (2*3^n-1).
Comments