Number of 3 X n 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.

Terms

a(0) =8a(1) =21a(2) =37a(3) =58a(4) =85a(5) =119a(6) =161a(7) =212a(8) =273a(9) =345a(10) =429a(11) =526a(12) =637a(13) =763a(14) =905a(15) =1064a(16) =1241a(17) =1437a(18) =1653a(19) =1890a(20) =2149a(21) =2431a(22) =2737a(23) =3068a(24) =3425a(25) =3809a(26) =4221a(27) =4662a(28) =5133a(29) =5635