Number of n X n matrices over {0,1} with rows and columns summing to 3, rows and columns sorted (>=) by value.
A181344
Number of n X n matrices over {0,1} with rows and columns summing to 3, rows and columns sorted (>=) by value.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =5a(5) =25a(6) =161a(7) =1112a(8) =8787a(9) =76156a(10) =728699a(11) =7609065a(12) =86162795a(13) =1050755884a(14) =13728407061a(15) =191309852944
External references
- oeis: A181344