20752

Appears in sequences

• Necklace permutations.at n=9A003322
• Number of B-trees of order 3 with n leaves.at n=28A014535
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 18.at n=15A031696
• Numbers whose base-4 representation contains exactly four 0's and four 1's.at n=28A045037
• Number of 2n-bead balanced binary strings, rotationally equivalent to reverse, complement and reversed complement.at n=20A045656
• a(n) = A000695(A014486(n)).at n=17A083931
• Row sums of correlation triangle for (1+x)^3/(1-x).at n=37A115293
• A triangle of polynomial coefficients: q(x,n)=-((x - 1)^(2*n + 1)/x^n)*Sum[(2*k + n)^n*Binomial[k, n]*x^k, {k, 0, Infinity}]; p(x,n)=q(x,n)+x^n*q(1/x,n).at n=9A155952
• A triangle of polynomial coefficients: q(x,n)=-((x - 1)^(2*n + 1)/x^n)*Sum[(2*k + n)^n*Binomial[k, n]*x^k, {k, 0, Infinity}]; p(x,n)=q(x,n)+x^n*q(1/x,n).at n=13A155952
• a(n) = 64*n^2 + 16.at n=17A157912
• 324n^2 + 2n.at n=7A158271
• a(n) = 256*n^2 + 16.at n=9A158574
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 429", based on the 5-celled von Neumann neighborhood.at n=30A272113
• Numbers missing from A001033 despite satisfying the necessary congruence conditions (see comments).at n=32A274470
• Number of partitions in all twice partitions of n where both partitions are strict.at n=21A327553
• Numbers k such that each of k, k+1, k+2, and k+4 is a sum of two squares.at n=28A328224
• Consecutive states of the linear congruential pseudo-random number generator (1093*s + 18257) mod 86436 when started at s=1.at n=3A385340