Number of length n arrays x(i), i=1..n with x(i) in i..i+4 and no value appearing more than 2 times.
A250347
Number of length n arrays x(i), i=1..n with x(i) in i..i+4 and no value appearing more than 2 times.
Terms
- a(0) =5a(1) =25a(2) =122a(3) =581a(4) =2724a(5) =12734a(6) =59406a(7) =276816a(8) =1289208a(9) =6002949a(10) =27948445a(11) =130114896a(12) =605739129a(13) =2819935996a(14) =13127753699a(15) =61113960653a(16) =284504996836
External references
- oeis: A250347