Number of permutations of 0..n-1 with all sums of 2 through 2 adjacent terms squared respectively unique.
A147731
Number of permutations of 0..n-1 with all sums of 2 through 2 adjacent terms squared respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =624a(6) =4560a(7) =37440a(8) =323520a(9) =3167616a(10) =34387248a(11) =397398720a(12) =5179836888a(13) =69488212320
External references
- oeis: A147731