Number of n X 5 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, rows lexicographically nondecreasing, and columns lexicographically nonincreasing.
A229425
Number of n X 5 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, rows lexicographically nondecreasing, and columns lexicographically nonincreasing.
Terms
- a(0) =17a(1) =102a(2) =524a(3) =2204a(4) =7816a(5) =24126a(6) =66503a(7) =166972a(8) =387738a(9) =842802a(10) =1731129a(11) =3385828a(12) =6344979a(13) =11451106a(14) =19987862a(15) =33864276a(16) =55858927a(17) =89938670a(18) =141669058a(19) =218736396a(20) =331604442a(21) =494332150a(22) =725582545a(23) =1049856844a(24) =1498992304
External references
- oeis: A229425