Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
A299190
Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =13a(2) =9a(3) =80a(4) =220a(5) =518a(6) =2466a(7) =8609a(8) =26954a(9) =108253a(10) =391026a(11) =1364326a(12) =5142635a(13) =18805585a(14) =67927770a(15) =251558219a(16) =923421565a(17) =3375978025a(18) =12442380432a(19) =45744080554a(20) =167955473490a(21) =618311475706
External references
- oeis: A299190