Number of nX4 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 nX4 array.
A219213
Number of nX4 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 nX4 array.
Terms
- a(0) =10a(1) =12a(2) =113a(3) =493a(4) =2391a(5) =10287a(6) =42301a(7) =165593a(8) =623267a(9) =2251824a(10) =7816033a(11) =26126804a(12) =84401918a(13) =264341846a(14) =804616408a(15) =2384472619a(16) =6889408819a(17) =19431099135a(18) =53562044947a(19) =144465807848a(20) =381683301201a(21) =988840284744
External references
- oeis: A219213