Number of permutations of 2..n+1 with all sums of 2 through 5 adjacent terms squared respectively unique.
A147744
Number of permutations of 2..n+1 with all sums of 2 through 5 adjacent terms squared respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =4608a(7) =33952a(8) =305092a(9) =2822386a(10) =30933326a(11) =360660964a(12) =4441970306a(13) =60411890162
External references
- oeis: A147744