22430

Appears in sequences

• Triangle of coefficients of polynomials arising in enumeration of periodic sequences.at n=61A054722
• Number of n-bead necklace structures using exactly five different colored beads.at n=10A056298
• Number of primitive (period n) n-bead necklace structures using exactly five different colored beads.at n=10A056306
• a(n) = Sum_{i=1..n} floor((3/2)^i).at n=21A066778
• Triangle read by rows: T(n, k) is the number of primitive (period n) n-bead necklace structures with k different colors. Only includes structures that contain all k colors.at n=59A107424
• Triangle read by rows: T(n,k) is the number of k-block partitions of an n-set up to rotations.at n=59A152175
• Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,3,2,1,4 for x=0,1,2,3,4.at n=19A196073
• Triangle read by rows: T(n,k) is the number of n-bead necklace structures which are not self-equivalent under a nonzero rotation using exactly k different colored beads.at n=59A327693
• Number of binary strings of length n which are losing configurations in the palindrome game.at n=18A362368
• Triangle read by rows: the almost-Riordan array ( 1/(1-x) | 2/((1-x)*(1+x+sqrt(5*x^2-6*x+1))), (1-3*x-sqrt(5*x^2-6*x+1))/(2x) ).at n=47A373746