77746

Appears in sequences

• Hankel transform of a(n) is A006720(n+1). Hankel transform of a(n+1) is A006720(n+3).at n=10A254316
• Square array T(n, k) read by rising antidiagonals. Row n has the ordinary generating function (-(n*x^3-(n+1)*x^2+x) + sqrt((n*x^3-(n+1)*x^2+x)^2 - 4*(x^3-x^2)*((n+1)*x^2-x)))/(2*(x^3-x^2)).at n=76A377441