Column 2 of triangle in A333278.

Terms

a(0) =28a(1) =92a(2) =296a(3) =652a(4) =1408a(5) =2470a(6) =4312a(7) =6774a(8) =10428a(9) =14992a(10) =21492a(11) =29328a(12) =39876a(13) =52184a(14) =67616a(15) =85588a(16) =108192a(17) =133674a(18) =164992a(19) =200158a(20) =241560a(21) =287428a(22) =341768a(23) =401472a(24) =470764a(25) =546230a(26) =632404a(27) =726170a(28) =833420a(29) =948550