A180118 - cp's OEIS frontend

A180118 a(n) = Sum_{k=1..n} (k+2)!/k! = Sum_{k=1..n} (k+2)*(k+1).

n	a(n)
0	0
1	6
2	18
3	38
4	68
5	110
6	166
7	238
8	328
9	438
10	570
11	726
12	908
13	1118
14	1358
15	1630
16	1936
17	2278
18	2658
19	3078
20	3540
21	4046
22	4598
23	5198
24	5848
25	6550
26	7306
27	8118
28	8988
29	9918
30	10910
31	11966
32	13088
33	14278
34	15538
35	16870
36	18276
37	19758
38	21318
39	22958
40	24680
41	26486
42	28378
43	30358

[0, 6, 18, 38, 68, 110, 166, 238, 328, 438, 570, 726, 908, 1118, 1358, 1630, 1936, 2278, 2658, 3078, 3540, 4046, 4598, 5198, 5848, 6550, 7306, 8118, 8988, 9918, 10910, 11966, 13088, 14278, 15538, 16870, 18276, 19758, 21318, 22958, 24680, 26486, 28378, 30358]

cp's OEIS Frontend

A180118 a(n) = Sum_{k=1..n} (k+2)!/k! = Sum_{k=1..n} (k+2)*(k+1).

Table of values

List of values