Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
A304468
Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =49a(2) =117a(3) =322a(4) =1100a(5) =2957a(6) =8254a(7) =26698a(8) =77788a(9) =221123a(10) =681855a(11) =2041108a(12) =5932703a(13) =17889612a(14) =53854606a(15) =158987996a(16) =475744589a(17) =1430898909a(18) =4260906900a(19) =12733223515a(20) =38231707572a(21) =114317071912a(22) =341873189152
External references
- oeis: A304468