269583560

Appears in sequences

• a(n) = A305312(n)/4 if A305312(n)is even and a(n) = (A305312(n) - 1)/4 if A305312(n) is odd, for n >= 1.at n=21A308687
• a(n) is the numerator of the square of the n-th Lagrange number.at n=21A382098