Number of 3 X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3 X n array.
A219687
Number of 3 X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3 X n array.
Terms
- a(0) =6a(1) =9a(2) =31a(3) =87a(4) =208a(5) =452a(6) =922a(7) =1799a(8) =3394a(9) =6234a(10) =11196a(11) =19713a(12) =34085a(13) =57937a(14) =96878a(15) =159429a(16) =258304a(17) =412146a(18) =647840a(19) =1003547a(20) =1532627a(21) =2308645a(22) =3431682a(23) =5036203a(24) =7300766a(25) =10459890a(26) =14818436a(27) =20768893a(28) =28812001a(29) =39581185
External references
- oeis: A219687