261965

Appears in sequences

• Continued fraction for zeta(18).at n=1A013694
• Second term in continued fraction for zeta(n).at n=16A013697
• Triangle read by rows: T(n,k) is the number of k-matchings in the P_4 X P_n lattice graph.at n=42A100265
• Bisection of A013697.at n=8A190297