A161130 - cp's OEIS frontend

A161130 Sum of the differences between the largest and the smallest fixed points over all non-derangement permutations of {1,2,...,n}.

n	a(n)
0	0
1	0
2	1
3	2
4	13
5	74
6	523
7	4178
8	37609
9	376082
10	4136911
11	49642922
12	645357997
13	9035011946
14	135525179203
15	2168402867234
16	36862848742993
17	663531277373858
18	12607094270103319
19	252141885402066362
20	5294979593443393621

[0, 0, 1, 2, 13, 74, 523, 4178, 37609, 376082, 4136911, 49642922, 645357997, 9035011946, 135525179203, 2168402867234, 36862848742993, 663531277373858, 12607094270103319, 252141885402066362, 5294979593443393621]

cp's OEIS Frontend

A161130 Sum of the differences between the largest and the smallest fixed points over all non-derangement permutations of {1,2,...,n}.

Table of values

List of values