Number of 3Xn 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 3Xn array.
A219804
Number of 3Xn 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 3Xn array.
Terms
- a(0) =10a(1) =13a(2) =71a(3) =283a(4) =959a(5) =2949a(6) =8533a(7) =23726a(8) =63982a(9) =168050a(10) =430665a(11) =1078155a(12) =2639677a(13) =6327977a(14) =14871221a(15) =34300242a(16) =77728419a(17) =173227386a(18) =380005949a(19) =821199928a(20) =1749471843a(21) =3676624578a(22) =7626635592a(23) =15623929531a(24) =31625042904a(25) =63277018190
External references
- oeis: A219804