Number of length 7 arrays x(i), i=1..7 with x(i) in i..i+n and no value appearing more than 2 times.
A250356
Number of length 7 arrays x(i), i=1..7 with x(i) in i..i+n and no value appearing more than 2 times.
Terms
- a(0) =128a(1) =1791a(2) =12620a(3) =59406a(4) =214716a(5) =644040a(6) =1681860a(7) =3932472a(8) =8409252a(9) =16713576a(10) =31259100a(11) =55546440a(12) =94493292a(13) =154825032a(14) =245530836a(15) =378390360a(16) =568576020a(17) =835335912a(18) =1202762412a(19) =1700651496a(20) =2365457820a(21) =3241350600a(22) =4381375332
External references
- oeis: A250356