Number of n X 4 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..1 n X 4 array.

A219350

Number of n X 4 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..1 n X 4 array.

Terms

    a(0) =4a(1) =4a(2) =15a(3) =35a(4) =81a(5) =174a(6) =364a(7) =740a(8) =1459a(9) =2778a(10) =5105a(11) =9069a(12) =15615a(13) =26129a(14) =42600a(15) =67827a(16) =105680a(17) =161425a(18) =242124a(19) =357122a(20) =518634a(21) =742446a(22) =1048745a(23) =1463094a(24) =2017569a(25) =2752076a(26) =3715867a(27) =4969275a(28) =6585689a(29) =8653791

External references