A227363 - cp's OEIS frontend

A227363 a(n) = n + (n-1)(n-2) + (n-3)(n-4)(n-5) + (n-6)(n-7)(n-8)(n-9) + ... + ...*(n-n).

n	a(n)
0	0
1	1
2	2
3	5
4	10
5	17
6	32
7	61
8	110
9	185
10	316
11	557
12	986
13	1705
14	2840
15	4661
16	7702
17	12881
18	21620
19	35965
20	58706
21	94217
22	150016
23	239045
24	382670
25	614401
26	984332
27	1564301
28	2458810
29	3826745
30	5918936
31	9136597
32	14115686
33	21842225
34	33803620
35	52181021
36	80128082
37	122221801
38	185211440

[0, 1, 2, 5, 10, 17, 32, 61, 110, 185, 316, 557, 986, 1705, 2840, 4661, 7702, 12881, 21620, 35965, 58706, 94217, 150016, 239045, 382670, 614401, 984332, 1564301, 2458810, 3826745, 5918936, 9136597, 14115686, 21842225, 33803620, 52181021, 80128082, 122221801, 185211440]

cp's OEIS Frontend

A227363 a(n) = n + (n-1)(n-2) + (n-3)(n-4)(n-5) + (n-6)(n-7)(n-8)(n-9) + ... + ...*(n-n).

Table of values

List of values

cp's OEIS Frontend

A227363 a(n) = n + (n-1)*(n-2) + (n-3)*(n-4)*(n-5) + (n-6)*(n-7)*(n-8)*(n-9) + ... + ...*(n-n).

Table of values

List of values

A227363 a(n) = n + (n-1)(n-2) + (n-3)(n-4)(n-5) + (n-6)(n-7)(n-8)(n-9) + ... + ...*(n-n).