A305189 - cp's OEIS frontend

A305189 a(n) = 12 + 3 + 45 + 6 + 78 + 9 + 1011 + 12 + ... + (up to n).

n	a(n)
1	1
2	2
3	5
4	9
5	25
6	31
7	38
8	87
9	96
10	106
11	206
12	218
13	231
14	400
15	415
16	431
17	687
18	705
19	724
20	1085
21	1106
22	1128
23	1612
24	1636
25	1661
26	2286
27	2313
28	2341
29	3125
30	3155
31	3186
32	4147
33	4180
34	4214
35	5370
36	5406
37	5443
38	6812
39	6851
40	6891
41	8491
42	8533
43	8576
44	10425
45	10470
46	10516
47	12632

[1, 2, 5, 9, 25, 31, 38, 87, 96, 106, 206, 218, 231, 400, 415, 431, 687, 705, 724, 1085, 1106, 1128, 1612, 1636, 1661, 2286, 2313, 2341, 3125, 3155, 3186, 4147, 4180, 4214, 5370, 5406, 5443, 6812, 6851, 6891, 8491, 8533, 8576, 10425, 10470, 10516, 12632]

cp's OEIS Frontend

A305189 a(n) = 12 + 3 + 45 + 6 + 78 + 9 + 1011 + 12 + ... + (up to n).

Table of values

List of values

cp's OEIS Frontend

A305189 a(n) = 1*2 + 3 + 4*5 + 6 + 7*8 + 9 + 10*11 + 12 + ... + (up to n).

Table of values

List of values

A305189 a(n) = 12 + 3 + 45 + 6 + 78 + 9 + 1011 + 12 + ... + (up to n).