39468

Appears in sequences

• Expansion of 1/((1-x)*(1-x^2))^4.at n=17A038164
• Array defined in A064643 read from left to right (cf. A107783).at n=29A064644
• Number of base-2 palindromic primes (A016041) in range [2^2n,2^(2n+1)].at n=18A095741
• Partial sums of the central trinomial coefficients (A002426).at n=11A097893
• Array defined in A064643 read in direction in which it was created.at n=34A107783
• Number of palindromic primes in base 2 with exactly n binary digits.at n=38A117773
• Triangle V, read by rows, where column k of V^(j+1) = column j of P^(3k+2), for j>=0, k>=0 and where P=A136220.at n=31A136230
• Triangle interpolating the swinging factorial (A056040) restricted to odd indices with its binomial inverse. Triangle read by rows. For n >= 0, k >= 0.at n=34A163772
• Triangle read by rows, A033184 * A091768 (diagonalized as an infinite lower triangular matrix).at n=50A163946
• Number of rooted factorizations of n-permutations into ordered cycles.at n=6A218817
• Irregular triangle M_2(n,k) read by rows: number of maximum k-matchings in rooted plane trees of size n, 1<=k<=n/2, 2<=n.at n=37A219731
• Denominators of coefficients in asymptotic expansion of log z + psi(z+1/z), where psi is the digamma function.at n=24A222804
• A bisection of A222804.at n=12A222806
• Number of length-2n central circular binary strings without zigzags (see reference for precise definition).at n=13A263656
• Erroneous version of A263656.at n=13A283021
• Expansion of Product_{k>=0} (1-x^(5*k+1))^(5*k+1).at n=49A285071
• Expansion of Product_{k>=1} (1 + x^(5*k-4))^(5*k-4).at n=49A285338
• Constant term in the expansion of (Sum_{k=0..n} k*(x^k + x^(-k)))^3.at n=11A303916
• On a spirally numbered square grid, with labels starting at 1, this is the number of steps that an (n,n+1) leaper makes before getting trapped, or -1 if it never gets trapped.at n=22A343178