Number of n X 1 0..4 arrays with rows and columns lexicographically nondecreasing and no element equal to the number of horizontal and vertical neighbors equal to itself.

A201722

Number of n X 1 0..4 arrays with rows and columns lexicographically nondecreasing and no element equal to the number of horizontal and vertical neighbors equal to itself.

Terms

    a(0) =4a(1) =10a(2) =20a(3) =35a(4) =56a(5) =83a(6) =116a(7) =155a(8) =200a(9) =251a(10) =308a(11) =371a(12) =440a(13) =515a(14) =596a(15) =683a(16) =776a(17) =875a(18) =980a(19) =1091a(20) =1208a(21) =1331a(22) =1460a(23) =1595a(24) =1736a(25) =1883a(26) =2036a(27) =2195a(28) =2360a(29) =2531

External references