Duplicate of A086749.

Terms

a(0) =5a(1) =16a(2) =47a(3) =106a(4) =233a(5) =412a(6) =689a(7) =1020a(8) =1451a(9) =2050a(10) =2759a(11) =3678a(12) =4741a(13) =5894a(14) =7191a(15) =8714