Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A298707

Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =3a(2) =0a(3) =2a(4) =6a(5) =20a(6) =22a(7) =92a(8) =206a(9) =460a(10) =1176a(11) =2966a(12) =6898a(13) =17232a(14) =42850a(15) =103328a(16) =254344a(17) =630010a(18) =1536786a(19) =3773848a(20) =9309476a(21) =22822020a(22) =56028990a(23) =137918372a(24) =338696066a(25) =831789610a(26) =2045396676a(27) =5025784292a(28) =12346278992a(29) =30346864108

External references