60480225

Appears in sequences

• Let K(n) = integral(t=-1,1, t^(2n)*(1-t^2)^(2n)/(1+it)^(3n+1) dt) and write K(n) = d(n)*Pi - b(n)/a(n) where a(n), b(n), d(n) are positive integers; sequence gives a(n).at n=10A305998
• Alternating row sums of Riordan triangle A319203.at n=29A321205