6908733

Appears in sequences

• a(n) = (n-1)*3^(n-2), n > 0.at n=13A027471
• For the numbers k that can be expressed as k = w + x = y*z with w*x = y^3 + z^3 where w, x, y, and z are all positive integers, this sequence gives the corresponding values of w*x.at n=25A057443
• Numbers of the form (9^i)*(13^j), with i, j >= 0.at n=29A108748
• Denominators of a ternary BBP-type formula for log(3).at n=12A154920
• a(n) = (2*n + 1)*9^n.at n=6A155988
• Denominators of ternary BBP-type series for log(5).at n=9A164985
• Row sums of A211230.at n=24A211231
• a(n) = 13*3^n.at n=12A258597
• E.g.f.: Sum_{n>=1} x^(n^2) * exp(3*x^n) / n!.at n=12A265943
• Triangle T(n,k) = 3*T(n-1,k) + T(n-3,k-1) for k = 0..floor(n/3) with T(0,0) = 1 and T(n,k) = 0 for n or k < 0, read by rows.at n=46A317497
• Expansion of Sum_{n>=1} ( (3 + x^n)^n - 3^n ).at n=12A318638
• Triangle T(n,k) = 3*T(n-1,k) + T(n-4,k-1) for k = 0..floor(n/4), with T(0,0) = 1 and T(n,k) = 0 for n or k < 0, read by rows.at n=41A318773