Number of permutations of 2..n+1 with all sums of 2 through 3 adjacent terms squared respectively unique.
A147742
Number of permutations of 2..n+1 with all sums of 2 through 3 adjacent terms squared respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =4608a(7) =35104a(8) =314876a(9) =2945156a(10) =32435238a(11) =381940958a(12) =4765565464a(13) =65551559472
External references
- oeis: A147742