2421009

Appears in sequences

• a(n) = n^5*(n^2 + 1)/2.at n=9A168364
• a(n) = n^10*(n^4 + 1)/2.at n=3A170796
• (n-1)-st elementary symmetric function of the first n terms of the periodic sequence (3,1,3,1,3,1,3,1,...).at n=20A203231
• Triangle T, read by rows, where T(n,k) = [T^(3^k)](n-k,0) * (3^k)^(n-k) for n>=k>=0 such that row n of the 3^(n-1)-th root of T consists solely of integers given by: [T^( 1/3^(n-1) )](n,k) = (3^k)^(n-k) for n>=0.at n=18A274480
• Triangle read by rows: T(n,k) is the number of occurrences of the periodic substring (0011)^k in the periodic string (000111)^n.at n=26A373628