Number of nX2 0..3 arrays with every diagonal, row and column running average nondecreasing rightwards and downwards and diagonally.
A201830
Number of nX2 0..3 arrays with every diagonal, row and column running average nondecreasing rightwards and downwards and diagonally.
Terms
- a(0) =10a(1) =50a(2) =212a(3) =823a(4) =3030a(5) =10777a(6) =37530a(7) =128742a(8) =437110a(9) =1472736a(10) =4933374a(11) =16449879a(12) =54649472a(13) =181008926a(14) =598052300a(15) =1971884632a(16) =6490418396a(17) =21331768570a(18) =70022479666a(19) =229604183052a(20) =752170525867
External references
- oeis: A201830