Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
A316920
Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =9a(2) =13a(3) =31a(4) =81a(5) =184a(6) =492a(7) =1457a(8) =4371a(9) =13738a(10) =44698a(11) =147992a(12) =497182a(13) =1687343a(14) =5760403a(15) =19745581a(16) =67869355a(17) =233664175a(18) =805343315a(19) =2777680268a(20) =9584619952a(21) =33081967287a(22) =114206172731a(23) =394310805436
External references
- oeis: A316920