20994

Appears in sequences

• Number of graphs with n nodes, n-1 edges and no isolated vertices.at n=12A006648
• Numbers k such that 2^k - 11 is prime.at n=15A096817
• Expansion of psi(x^6) / psi(-x) in powers of x where psi() is a Ramanujan theta function.at n=47A132217
• 1-sequence of reduction of the lower Wythoff sequence by x^2 -> x+1.at n=14A192301
• Expansion of f(-x, -x^5) * f(x, x^7) / f(-x, -x^2)^2 in powers of x where f(, ) is Ramanujan's general theta function.at n=23A262146
• a(n) = 108*n^2 - 228*n + 114 (n>=2).at n=13A304618