Erroneous version of A028419.

Terms

a(0) =0a(1) =1a(2) =8a(3) =29a(4) =79a(5) =174a(6) =338a(7) =597a(8) =984a(9) =1531a(10) =2284a(11) =3285a(12) =4581a(13) =6232a(14) =8294a(15) =10821a(16) =13896