A185138 - cp's OEIS frontend

A185138 a(4n) = n(4n-1); a(2n+1) = n(n+1)/2; a(4n+2) = (2n+1)(4*n+1).

n	a(n)
0	0
1	0
2	1
3	1
4	3
5	3
6	15
7	6
8	14
9	10
10	45
11	15
12	33
13	21
14	91
15	28
16	60
17	36
18	153
19	45
20	95
21	55
22	231
23	66
24	138
25	78
26	325
27	91
28	189
29	105
30	435
31	120
32	248
33	136
34	561
35	153
36	315
37	171
38	703
39	190
40	390
41	210
42	861
43	231
44	473
45	253
46	1035
47	276
48	564
49	300
50	1225
51	325

[0, 0, 1, 1, 3, 3, 15, 6, 14, 10, 45, 15, 33, 21, 91, 28, 60, 36, 153, 45, 95, 55, 231, 66, 138, 78, 325, 91, 189, 105, 435, 120, 248, 136, 561, 153, 315, 171, 703, 190, 390, 210, 861, 231, 473, 253, 1035, 276, 564, 300, 1225, 325]

cp's OEIS Frontend

A185138 a(4n) = n(4n-1); a(2n+1) = n(n+1)/2; a(4n+2) = (2n+1)(4*n+1).

Table of values

List of values

cp's OEIS Frontend

A185138 a(4*n) = n*(4*n-1); a(2*n+1) = n*(n+1)/2; a(4*n+2) = (2*n+1)*(4*n+1).

Table of values

List of values

A185138 a(4n) = n(4n-1); a(2n+1) = n(n+1)/2; a(4n+2) = (2n+1)(4*n+1).