106722

Appears in sequences

• Coefficients of Legendre polynomials.at n=6A002462
• Number of subsets {x(1),x(2),...,x(k)} of {1,2,...,n} such that all differences |x(i)-x(j)| are distinct.at n=30A143823
• a(n) = n^2*(n+1)^2/2.at n=21A163102
• a(n) = (2*n^2*(n^2 - 3) - (2*n^2 + 1)*(-1)^n + 1)/64.at n=42A302647
• Chessboard rectangles sequence (see Comments), also A037270 interleaved with A163102.at n=43A317714
• a(n) = Product_{d|n, d>1} prime(A318881(d)), where A318881(d) records the prime signature of A000010(d).at n=41A319344
• a(n) = Product_{d|n, d>1} prime(A318881(d)), where A318881(d) records the prime signature of A000010(d).at n=53A319344
• a(n) = Product_{d|n, d>1} prime(A318881(d)), where A318881(d) records the prime signature of A000010(d).at n=65A319344