13507416

Appears in sequences

• Coordination sequence for A_8 lattice.at n=9A008391
• Number of integer sequences of length n+1 with sum zero and sum of absolute values 18.at n=7A157058
• a(0) = 0, a(n) = [x^n] P(n-1,(1 + x)/(1 - x)) for n >= 1, where P(n,x) denotes the n-th Legendre polynomial.at n=9A352654