A032527 - cp's OEIS frontend

A032527 Concentric pentagonal numbers: floor( 5*n^2 / 4 ).

n	a(n)
0	0
1	1
2	5
3	11
4	20
5	31
6	45
7	61
8	80
9	101
10	125
11	151
12	180
13	211
14	245
15	281
16	320
17	361
18	405
19	451
20	500
21	551
22	605
23	661
24	720
25	781
26	845
27	911
28	980
29	1051
30	1125
31	1201
32	1280
33	1361
34	1445
35	1531
36	1620
37	1711
38	1805
39	1901
40	2000
41	2101
42	2205
43	2311
44	2420
45	2531
46	2645
47	2761
48	2880
49	3001

[0, 1, 5, 11, 20, 31, 45, 61, 80, 101, 125, 151, 180, 211, 245, 281, 320, 361, 405, 451, 500, 551, 605, 661, 720, 781, 845, 911, 980, 1051, 1125, 1201, 1280, 1361, 1445, 1531, 1620, 1711, 1805, 1901, 2000, 2101, 2205, 2311, 2420, 2531, 2645, 2761, 2880, 3001]

cp's OEIS Frontend

A032527 Concentric pentagonal numbers: floor( 5*n^2 / 4 ).

Table of values

List of values