A diagonal of A059419.

Terms

a(0) =16a(1) =136a(2) =616a(3) =2016a(4) =5376a(5) =12432a(6) =25872a(7) =49632a(8) =89232a(9) =152152a(10) =248248a(11) =390208a(12) =594048a(13) =879648a(14) =1271328a(15) =1798464a(16) =2496144a(17) =3405864a(18) =4576264a(19) =6063904a(20) =7934080a(21) =10261680a(22) =13132080a(23) =16642080a(24) =20900880a(25) =26031096a(26) =32169816a(27) =39469696