Second member of the Diophantine pair (m,k) that satisfies 5*(m^2 + m) = k^2 + k; a(n) = k.

A077262

Second member of the Diophantine pair (m,k) that satisfies 5*(m^2 + m) = k^2 + k; a(n) = k.

Terms

    a(0) =0a(1) =5a(2) =14a(3) =99a(4) =260a(5) =1785a(6) =4674a(7) =32039a(8) =83880a(9) =574925a(10) =1505174a(11) =10316619a(12) =27009260a(13) =185124225a(14) =484661514a(15) =3321919439a(16) =8696898000a(17) =59609425685a(18) =156059502494

External references