30667

Appears in sequences

• Number of necklaces with 8 black beads and n-8 white beads.at n=16A032193
• Sum of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly one way.at n=12A076454
• a(n) = (1/(3*n))*Sum_{d|n, d even} phi(2*n/d)*binomial(3d/2,d).at n=8A082936
• Number of reduced words of length n in Coxeter group on 14 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.at n=4A163090
• Number of nondecreasing strings of numbers x(i=1..n) in -5..5 with sum x(i)^3 equal to 0.at n=19A188273
• Expansion of (1+4*x+x^2)/((1+x)^2*(1-x)^5).at n=24A233329
• Number A(n,k) of necklaces with n white beads and k*n black beads; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=63A261494
• a(n) = 21*n^2 - 33*n + 13.at n=38A289134
• Number of compositions (ordered partitions) of n into distinct parts >= 3.at n=41A339101