a(n) is the product of divisors of the n-th triangular number.

Terms

a(0) =1a(1) =3a(2) =36a(3) =100a(4) =225a(5) =441a(6) =21952a(7) =10077696a(8) =91125a(9) =3025a(10) =18974736a(11) =37015056a(12) =8281a(13) =121550625a(15) =342102016a(16) =3581577a(17) =5000211a(18) =1303210000a(20) =2847396321a(21) =64009a(24) =34328125a(25) =15178486401