Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 3Xn array.
A220206
Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 3Xn array.
Terms
- a(0) =10a(1) =38a(2) =238a(3) =956a(4) =3294a(5) =10762a(6) =33804a(7) =101396a(8) =290268a(9) =797260a(10) =2114037a(11) =5437406a(12) =13608427a(13) =33213956a(14) =79197154a(15) =184791538a(16) =422567975a(17) =948321570a(18) =2091208462a(19) =4536221049a(20) =9688543730a(21) =20391555264a(22) =42323960656a(23) =86685565242a(24) =175300099767
External references
- oeis: A220206