Number of nX3 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero.
A304225
Number of nX3 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =3a(2) =5a(3) =6a(4) =11a(5) =16a(6) =22a(7) =33a(8) =49a(9) =71a(10) =104a(11) =153a(12) =224a(13) =328a(14) =481a(15) =705a(16) =1033a(17) =1514a(18) =2219a(19) =3252a(20) =4766a(21) =6985a(22) =10237a(23) =15003a(24) =21988a(25) =32225a(26) =47228a(27) =69216a(28) =101441a(29) =148669
External references
- oeis: A304225