Number of permutations of 1..n with all sums of 2 through 4 adjacent terms squared respectively unique.
A147738
Number of permutations of 1..n with all sums of 2 through 4 adjacent terms squared respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =4824a(7) =33912a(8) =291784a(9) =2859364a(10) =29502962a(11) =345179484a(12) =4292682670a(13) =58008700424
External references
- oeis: A147738