Number of 0..n arrays x(0..11) of 12 elements with zero 6th differences.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =6a(5) =7a(6) =8a(7) =13a(8) =18a(9) =23a(10) =30a(11) =39a(12) =48a(13) =63a(14) =82a(15) =109a(16) =142a(17) =187a(18) =236a(19) =295a(20) =380a(21) =527a(22) =682a(23) =859a(24) =1086a(25) =1353a(26) =1662a(27) =2055a(28) =2488a(29) =3017