Number of n X 3 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..2 n X 3 array.

A219212

Number of n X 3 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..2 n X 3 array.

Terms

    a(0) =6a(1) =7a(2) =37a(3) =113a(4) =345a(5) =955a(6) =2508a(7) =6303a(8) =15251a(9) =35567a(10) =80116a(11) =174791a(12) =370485a(13) =765038a(14) =1542719a(15) =3044020a(16) =5887082a(17) =11175742a(18) =20850733a(19) =38274020a(20) =69187496a(21) =123264742a(22) =216590254a(23) =375571230a(24) =643035886a(25) =1087631035a(26) =1818143164a(27) =3005088770

External references