Total number of occurrences of 7 in the (signed) displacement sets of all permutations of [n+7] divided by 7!.
A324357
Total number of occurrences of 7 in the (signed) displacement sets of all permutations of [n+7] divided by 7!.
Terms
- a(0) =0a(1) =1a(2) =15a(3) =193a(4) =2479a(5) =33081a(6) =464807a(7) =6906257a(8) =108589887a(9) =1805179321a(10) =31676392519a(11) =585609896433
External references
- oeis: A324357