Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 2 X n array.
A219803
Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 2 X n array.
Terms
- a(0) =4a(1) =4a(2) =10a(3) =21a(4) =39a(5) =68a(6) =114a(7) =186a(8) =297a(9) =465a(10) =714a(11) =1075a(12) =1587a(13) =2298a(14) =3266a(15) =4560a(16) =6261a(17) =8463a(18) =11274a(19) =14817a(20) =19231a(21) =24672a(22) =31314a(23) =39350a(24) =48993a(25) =60477a(26) =74058a(27) =90015a(28) =108651a(29) =130294
External references
- oeis: A219803