Number of n X 3 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.
A304305
Number of n X 3 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =23a(2) =77a(3) =261a(4) =918a(5) =3270a(6) =11739a(7) =42286a(8) =152593a(9) =551277a(10) =1992676a(11) =7204835a(12) =26054060a(13) =94223657a(14) =340770353a(15) =1232459982a(16) =4457471732a(17) =16121551990a(18) =58307765439a(19) =210885454206a(20) =762723638858
External references
- oeis: A304305