43929

Appears in sequences

• Number of symmetric nonnegative integer 9 X 9 matrices with sum of elements equal to 4*n, under action of dihedral group D_4.at n=8A054549
• Number of different n X n symmetric matrices with nonnegative entries summing to 4. Also number of symmetric oriented graphs with 4 arcs on n points.at n=18A139594
• a(n) = 38*n^2 + 1.at n=34A158593
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 81", based on the 5-celled von Neumann neighborhood.at n=40A270100
• Number of multiples of n which have only distinct and nonzero digits in base 10.at n=39A328287
• Triangle read by columns: T(n,k) is the number of functions from an n-element set to a k-element set that are not one-to-one, k>=n>=1.at n=40A347034
• G.f. A(x) satisfies: x^2*A(x) = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x)^n.at n=11A355364
• Square array read by ascending antidiagonals: T(n,k) = [x^k] 1/(1 + x) * Legendre_P(k, (1 - x)/(1 + x))^(-n) for n >= 1, k >= 0.at n=31A364298
• a(n) = Sum_{k=0..floor(3*n/8)} binomial(k+2,3*n-8*k).at n=46A390036
• a(n) = Sum_{k=0..floor(n/2)} binomial(k+2,4*n-8*k+2).at n=34A390222