Number of nX3 0..1 arrays with every element equal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A300110

Number of nX3 0..1 arrays with every element equal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =7a(2) =15a(3) =29a(4) =63a(5) =199a(6) =629a(7) =1837a(8) =5397a(9) =15855a(10) =46857a(11) =139131a(12) =411859a(13) =1218209a(14) =3604353a(15) =10667225a(16) =31574175a(17) =93448425a(18) =276561899a(19) =818499247a(20) =2422423269a(21) =7169412933a(22) =21218549729a(23) =62798160031a(24) =185856754621a(25) =550059982899

External references