Total number of occurrences of 3 in the (signed) displacement sets of all permutations of [n+3] divided by 3!.
A324353
Total number of occurrences of 3 in the (signed) displacement sets of all permutations of [n+3] divided by 3!.
Terms
- a(0) =0a(1) =1a(2) =7a(3) =49a(4) =375a(5) =3181a(6) =29843a(7) =307833a(8) =3468671a(9) =42432445a(10) =560365779a(11) =7948580377a(12) =120557659247
External references
- oeis: A324353