1/16 the number of permutations of 0..n having exactly 4 maxima.
A130660
1/16 the number of permutations of 0..n having exactly 4 maxima.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =17a(7) =496a(8) =8576a(9) =115072a(10) =1328336a(11) =13899904a(12) =135927040a(13) =1266360320a(14) =11385790720a(15) =99682672640a(16) =855303553024
External references
- oeis: A130660