Number of nX3 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors exactly one smaller than itself.
A266020
Number of nX3 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors exactly one smaller than itself.
Terms
- a(0) =4a(1) =14a(2) =33a(3) =91a(4) =316a(5) =1045a(6) =3394a(7) =11102a(8) =36842a(9) =122052a(10) =402200a(11) =1324463a(12) =4373322a(13) =14443892a(14) =47671729a(15) =157325046a(16) =519327402a(17) =1714258173a(18) =5658200079a(19) =18676187387a(20) =61646837018a(21) =203484164638a(22) =671655360694
External references
- oeis: A266020