Number of (n+1) X (4+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nondecreasing.
A263869
Number of (n+1) X (4+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nondecreasing.
Terms
- a(0) =3a(1) =3a(2) =7a(3) =7a(4) =16a(5) =17a(6) =41a(7) =48a(8) =113a(9) =141a(10) =303a(11) =387a(12) =752a(13) =962a(14) =1713a(15) =2175a(16) =3607a(17) =4531a(18) =7095a(19) =8811a(20) =13168a(21) =16171a(22) =23257a(23) =28262a(24) =39365a(25) =47373a(26) =64223a(27) =76599a(28) =101472a(29) =120036
External references
- oeis: A263869