Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 4 and the upper left element equal to 0.
A267333
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 4 and the upper left element equal to 0.
Terms
- a(0) =6a(1) =0a(2) =0a(3) =1a(4) =22a(5) =396a(6) =2516a(7) =10533a(8) =33704a(9) =92526a(10) =369726a(11) =2640466a(12) =20643782a(13) =138985920a(14) =774999596a(15) =3688265633a(16) =16042197634a(17) =71499663298a(18) =364035498690
External references
- oeis: A267333