Number of (n+1)X(5+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.
A263870
Number of (n+1)X(5+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) =4a(1) =4a(2) =14a(3) =16a(4) =61a(5) =93a(6) =494a(7) =975a(8) =4917a(9) =10340a(10) =41366a(11) =85816a(12) =280438a(13) =562456a(14) =1574783a(15) =3040270a(16) =7560914a(17) =14059280a(18) =31856173a(19) =57181978a(20) =120205886a(21) =208862596a(22) =412782291a(23) =696193791a(24) =1306513751a(25) =2144538358a(26) =3851037496a(27) =6166629823
External references
- oeis: A263870