20643

Appears in sequences

• Powers of cube root of 2 rounded to nearest integer.at n=43A017980
• Powers of cube root of 2 rounded up.at n=43A017981
• Number of partitions satisfying (cn(0,5) <= cn(2,5) = cn(3,5)).at n=50A036804
• Revert transform of 2*x*(1-x-x^3-x^5+x^6)-x/(1+x).at n=8A049186
• Number of 3 X n binary matrices with distinct rows, up to row and column permutation; (n,3)-hypergraphs (including empty hyperedge but excluding multiple hyperedges).at n=12A055194
• Number of primitive (aperiodic) word structures of length n using a 6-ary alphabet.at n=8A056277
• Expansion of 1/(1-x-x^4-x^6).at n=28A120446
• Triangle where g.f. of row n = Product_{i=0..n} [F(i+1) + F(i)*x] for n>=0, where F(i) = A000045(i) is the i-th Fibonacci number.at n=23A130405
• Numbers k such that 64*k^6 + 1091 is prime.at n=24A155809
• Numbers that match polynomials over {0,1} that have a factor containing -3 as a coefficient; see Comments.at n=30A208182
• Positions of 3's in A264977; positions of 6's in A277330.at n=40A277713