43776

Appears in sequences

• 2n-step polygons on b.c.c. lattice.at n=2A001667
• a(n) = 2^(n-1)*(2^n - (-1)^n)/3.at n=9A003683
• tan(arctanh(x)^2) = 2/2!*x^2 + 16/4!*x^4 + 608/6!*x^6 + 43776/8!*x^8 + ...at n=4A012757
• Number of rational knots (or two-bridge knots) with n crossings (up to mirroring).at n=17A018240
• Number of rotationally symmetric solutions for queens on n X n board.at n=28A033148
• Numbers n such that A048767(n) = n.at n=34A048768
• Number of strongly triple-free subsets of {1, 2, ..., n}.at n=20A050295
• Number of basis partitions of n+36 with Durfee square size 6.at n=35A053801
• a(n) = n^2*(2*n^2 + 1)/3.at n=16A071270
• Duplicate of A018240.at n=17A090596
• a(n) = - a(n-1) + 5(a(n-2) + a(n-3)) - 2(a(n-4) + a(n-5)) - 8(a(n-6) + a(n-7)).at n=18A090597
• Number of walks of length n between two nodes at distance 2 in the cycle graph C_9.at n=16A095367
• Primal codes of finite permutations on positive integers.at n=44A109297
• Starting a priori with the fraction 1/1, the denominators of fractions built according to the rule: add top and bottom to get the new bottom, add top and 9 times the bottom to get the new top.at n=7A110953
• a(n) = C(n,a)+C(n,b)+C(n,c)... where n = abc... are the decimal digits of n.at n=18A111696
• Matrix log of triangle A111825, which shifts columns left and up under matrix 6th power; these terms are the result of multiplying each element in row n and column k by (n-k)!.at n=16A111828
• Triangle P, read by rows, that satisfies [P^2](n,k) = P(n+1,k+1) for n>=k>=0, also [P^(2*m)](n,k) = [P^m](n+1,k+1) for all m, where [P^m](n,k) denotes the element at row n, column k, of the matrix power m of P, with P(k,k)=1 and P(k+2,2)=P(k+2,0) for k>=0.at n=41A111975
• Number of ordered quadruples (i,j,k,l) in range [0..n] satisfying i == j (mod 2), j == k (mod 3) and k == l (mod 4).at n=31A115523
• a(n) = smallest possible (product of b(k)'s + product of c(k)'s), where the positive integers <= n are partitioned somehow into {b(k)} and {c(k)}.at n=12A127180
• Pyramidal 47-gonal numbers.at n=17A130566