26481

Appears in sequences

• Hexagonal prism numbers: a(n) = (n + 1)*(3*n^2 + 3*n + 1).at n=20A005915
• Expansion of 1/((1-x)*(1-2*x)*(1-5*x)*(1-10*x)).at n=4A021144
• Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=4.at n=9A068021
• Structured great rhombicubeoctahedral numbers.at n=12A100146
• a(n) = 4*a(n-1) + 3*a(n-2), with a(0)=0, a(1)=3.at n=7A106570
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, -1, 0), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.at n=8A150397
• Number of (n+1) X 2 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.at n=4A206535
• Number of (n+1) X 6 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.at n=0A206539
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.at n=10A206542
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.at n=14A206542
• Number of partitions of n not containing the number of distinct parts as a part.at n=41A239946
• Irregular triangle read by rows: coefficients of polynomials related to Stirling permutations.at n=41A256978
• Irregular triangle read by rows: coefficients of polynomials related to Stirling permutations.at n=43A256978
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 825", based on the 5-celled von Neumann neighborhood.at n=28A273581
• Number of rectangular plane partitions of n.at n=27A323429
• a(n) = Sum_{1 <= i < j <= n} (i*j)^4.at n=4A351760
• a(n) = Sum_{j=1..n} Sum_{k=1..n} phi(j*k) / phi(k).at n=40A372636
• Integers k such that A378414(k) == k (mod A066417(k)).at n=12A378481
• a(n) = 10*binomial(n,5) + 6*binomial(n,4) + binomial(n,3) + binomial(n,2).at n=14A380445
• a(n) is the first nonprime k such that the sum over the A389751(n) consecutive nonprimes starting at k equals A389751(n)^3.at n=8A390586