Number of n X 5 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing.
A229442
Number of n X 5 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing.
Terms
- a(0) =7a(1) =19a(2) =60a(3) =212a(4) =753a(5) =2546a(6) =8024a(7) =23428a(8) =63430a(9) =159945a(10) =377840a(11) =841419a(12) =1777036a(13) =3578998a(14) =6908102a(15) =12834739a(16) =23041529a(17) =40103959a(18) =67871516a(19) =111976374a(20) =180501843a(21) =284848554a(22) =440842772a(23) =670138334a(24) =1001971536a(25) =1475336877a(26) =2141660944
External references
- oeis: A229442