51940

Appears in sequences

• Number of inequivalent ways to color vertices of a regular tetrahedron using <= n colors.at n=28A006008
• Cyclotomic polynomials Phi_n at x=phi, floored down (where phi = tau = (sqrt(5)+1)/2).at n=39A063703
• a(n) = Sum_{i=1..n} C(i+2,3)^3.at n=4A086021
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 181", based on the 5-celled von Neumann neighborhood.at n=41A270628
• Number of nX6 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=6A281398
• Number of 7Xn 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=5A281406
• a(n) = (-1)^(n-1) + Sum_{d|n, d>1} a(n/d)^d.at n=41A305572
• Numbers k that divide the k-th Franel number.at n=29A372940