Number of nX6 0..2 arrays with no element equal to more than one of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A281538
Number of nX6 0..2 arrays with no element equal to more than one of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =9a(1) =3056a(2) =63840a(3) =146956a(4) =290073a(5) =560972a(6) =1066920a(7) =2001002a(8) =3797780a(9) =7294930a(10) =13957058a(11) =26289482a(12) =48689121a(13) =88983896a(14) =161189818a(15) =290577490a(16) =522149018a(17) =935543592a(18) =1669547078a(19) =2965851310a(20) =5243956096a(21) =9233806648a(22) =16204912228
External references
- oeis: A281538