Product of Fibonacci and (shifted) triangular numbers.

Terms

a(0) =0a(1) =0a(2) =1a(3) =6a(4) =18a(5) =50a(6) =120a(7) =273a(8) =588a(9) =1224a(10) =2475a(11) =4895a(12) =9504a(13) =18174a(14) =34307a(15) =64050a(16) =118440a(17) =217192a(18) =395352a(19) =714951a(20) =1285350a(21) =2298660a(22) =4091241a(23) =7250221a(24) =12797568a(25) =22507500a(26) =39452725a(27) =68942718a(28) =120132558a(29) =208776974