71744535

Appears in sequences

• a(n) = 5*3^n.at n=15A005030
• a(n) = (n-1)*3^(n-2), n > 0.at n=15A027471
• a(n) = a(n-1) + a(n-2) + gcd(a(n-1), a(n-2)) for n > 1; a(0)=1, a(1)=1.at n=33A083658
• Denominators of a ternary BBP-type formula for log(3).at n=14A154920
• a(n) = (2*n + 1)*9^n.at n=7A155988
• a(n) = 3*a(n-2) for n > 2; a(1) = 5, a(2) = 3.at n=30A162813
• Denominators of ternary BBP-type series for log(5).at n=11A164985
• a(n) = 3*a(n-2) for n > 2; a(1) = 1, a(2) = 5.at n=31A166465
• Row sums of A211230.at n=28A211231
• Denominators of exponential expansion of (3/(2*log(1+x)))*(1 - 1/(1+x)^(2/3)).at n=14A284863
• G.f.: Sum_{n>=0} (2*n + 1) * x^n * (9 - x^n)^n.at n=7A326605