A330707 - cp's OEIS frontend

A330707 a(n) = ( 3*n^2 + n - 1 + (-1)^floor(n/2) )/4.

n	a(n)
0	0
1	1
2	3
3	7
4	13
5	20
6	28
7	38
8	50
9	63
10	77
11	93
12	111
13	130
14	150
15	172
16	196
17	221
18	247
19	275
20	305
21	336
22	368
23	402
24	438
25	475
26	513
27	553
28	595
29	638
30	682
31	728
32	776
33	825
34	875
35	927
36	981
37	1036
38	1092
39	1150
40	1210
41	1271
42	1333
43	1397
44	1463

[0, 1, 3, 7, 13, 20, 28, 38, 50, 63, 77, 93, 111, 130, 150, 172, 196, 221, 247, 275, 305, 336, 368, 402, 438, 475, 513, 553, 595, 638, 682, 728, 776, 825, 875, 927, 981, 1036, 1092, 1150, 1210, 1271, 1333, 1397, 1463]

cp's OEIS Frontend

A330707 a(n) = ( 3*n^2 + n - 1 + (-1)^floor(n/2) )/4.

Table of values

List of values