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

A305035

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

Terms

    a(0) =4a(1) =3a(2) =7a(3) =7a(4) =13a(5) =23a(6) =37a(7) =63a(8) =109a(9) =183a(10) =309a(11) =527a(12) =893a(13) =1511a(14) =2565a(15) =4351a(16) =7373a(17) =12503a(18) =21205a(19) =35951a(20) =60957a(21) =103367a(22) =175269a(23) =297183a(24) =503917a(25) =854455a(26) =1448821a(27) =2456655a(28) =4165565a(29) =7063207

External references