A076691 - OEIS

A076691

Integer values of 1/(3/4-sum(i = 1,m,i/3^i)).

12, 78732, 200126180395998828, 29580416459496810047953577440487325756896718148771211628, 859701978563120631640435743558342557761001110865498968863348734354573094697208147363766878468578515487017135250188680524136048749696547808864928561464719649040763860770252

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OFFSET

2,1

COMMENTS

sum(i>=1,i/3^i) = 3/4

LINKS

Table of n, a(n) for n=2..6.

FORMULA

a(n) = 4*sqrt(3)^(3^n-2n-3)

PROG

(PARI) a(n)=4*3^((3^n-2*n-3)/2)

CROSSREFS