54792

Appears in sequences

• Numbers k such that 3*2^k + 1 is prime.at n=30A002253
• 4*(2n-1)!*H(2n), where H(n) = Sum 1/i are harmonic numbers.at n=3A008380
• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MTW = ZSM-12 Nan[AlnSi28-nO56] starting with a T5 atom.at n=14A019195
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 13.at n=19A031691
• Square array read by antidiagonals giving number of binary trees of height n with k points on the n-th level (n,k>0).at n=32A065329
• a(n) = 169*n^2 + 2*n.at n=17A158220
• Coefficients of polynomials (in descending powers of x) P(n,x) := 1 + P(n-1,x)^2, where P(1,x) = x + 1.at n=31A158985
• Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 3^(2^m) + 1 for some m.at n=22A268657
• Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 5^(2^m) + 1 for some m.at n=12A268658
• Irregular triangular array, read by rows: row n shows the coefficients of the polynomial p(n,x) defined in Comments.at n=24A329429
• Number of graceful labelings of the n-sunlet graph.at n=3A333757