Total number of occurrences of 4 in the (signed) displacement sets of all permutations of [n+4] divided by 4!.
A324354
Total number of occurrences of 4 in the (signed) displacement sets of all permutations of [n+4] divided by 4!.
Terms
- a(0) =0a(1) =1a(2) =9a(3) =76a(4) =679a(5) =6576a(6) =69299a(7) =792926a(8) =9812079a(9) =130741156a(10) =1867777339a(11) =28494131106a(12) =462487232519
External references
- oeis: A324354