A081489 - cp's OEIS frontend

A081489 a(n) = n(2n^2 -3n +7)/6 = C(n, 1) + C(n, 2) + 2C(n, 3).

n	a(n)
1	1
2	3
3	8
4	18
5	35
6	61
7	98
8	148
9	213
10	295
11	396
12	518
13	663
14	833
15	1030
16	1256
17	1513
18	1803
19	2128
20	2490
21	2891
22	3333
23	3818
24	4348
25	4925
26	5551
27	6228
28	6958
29	7743
30	8585
31	9486
32	10448
33	11473
34	12563
35	13720
36	14946
37	16243
38	17613
39	19058
40	20580
41	22181
42	23863
43	25628

[1, 3, 8, 18, 35, 61, 98, 148, 213, 295, 396, 518, 663, 833, 1030, 1256, 1513, 1803, 2128, 2490, 2891, 3333, 3818, 4348, 4925, 5551, 6228, 6958, 7743, 8585, 9486, 10448, 11473, 12563, 13720, 14946, 16243, 17613, 19058, 20580, 22181, 23863, 25628]

cp's OEIS Frontend

A081489 a(n) = n(2n^2 -3n +7)/6 = C(n, 1) + C(n, 2) + 2C(n, 3).

Table of values

List of values

cp's OEIS Frontend

A081489 a(n) = n*(2*n^2 -3*n +7)/6 = C(n, 1) + C(n, 2) + 2*C(n, 3).

Table of values

List of values

A081489 a(n) = n(2n^2 -3n +7)/6 = C(n, 1) + C(n, 2) + 2C(n, 3).