81172

Appears in sequences

• Number of dyslexic rooted compound windmills with n nodes and leaves of 2 colors where any 2 submills extending from the same node are different.at n=12A032236
• a(n) = Sum_{k=0..n-1} 9^k*B(k)*binomial(n,k) where B(k) is the k-th Bernoulli number.at n=7A083013
• Numerator of Bernoulli(n, 1/9).at n=7A158807
• Sum of divisors of n and product of divisors of n are both perfect cubes.at n=16A244428
• Let x be the sum of the divisors d_i of k such that d_i | sigma(k). Sequence lists the numbers k for which x^3 = sigma(k).at n=4A284284
• G.f. = Phi^6, where Phi = g.f. for A028930.at n=18A328531