Number of n X 4 arrays with every diagonal and antidiagonal of length L containing a permutation of 1..L.
A179809
Number of n X 4 arrays with every diagonal and antidiagonal of length L containing a permutation of 1..L.
Terms
- a(0) =0a(1) =1a(2) =0a(3) =25a(4) =0a(5) =289a(6) =0a(7) =2025a(8) =0a(9) =16641a(10) =0a(11) =145161a(12) =0a(13) =1185921a(14) =0a(15) =9715689a(16) =0a(17) =80874049a(18) =0a(19) =668377609a(20) =0a(21) =5516478529a(22) =0a(23) =45630513769a(24) =0a(25) =377252695681a(26) =0a(28) =0a(30) =0a(32) =0
External references
- oeis: A179809