Number of permutations of floor(i*9/2), i=0..n-1, with all sums of 7 adjacent terms unique.
A152643
Number of permutations of floor(i*9/2), i=0..n-1, with all sums of 7 adjacent terms unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =5040a(7) =40320a(8) =339840a(9) =3151872a(10) =31926528a(11) =352653888a(12) =4226533888a(13) =54936197152a(14) =764592120720
External references
- oeis: A152643