Number of n X 2 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 columns, 0..3 n X 2 array.
A219454
Number of n X 2 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 columns, 0..3 n X 2 array.
Terms
- a(0) =4a(1) =4a(2) =13a(3) =26a(4) =57a(5) =116a(6) =231a(7) =450a(8) =859a(9) =1604a(10) =2928a(11) =5228a(12) =9139a(13) =15653a(14) =26282a(15) =43275a(16) =69900a(17) =110803a(18) =172457a(19) =263715a(20) =396482a(21) =586522a(22) =854417a(23) =1226696a(24) =1737153a(25) =2428374a(26) =3353494a(27) =4578206a(28) =6183045a(29) =8265971
External references
- oeis: A219454