1130976domain: NAppears in sequencesGeneralized Fibonacci numbers D_{n,2}.at n=19A006210Denominator of the generalized harmonic number H(n,5,2).at n=6A075140a(n) = 3*binomial(n+1, 5).at n=34A253942Areas of nondegenerate triangles with perimeter A385737(n) whose side lengths are triangular numbers.at n=25A385872