A127419 - cp's OEIS frontend

A127419 Recurrence: a(n) = a(n-1) + floor( (sqrt(8 * a(n-1) - 7) - 1)/2 ) for n>=2 with a(0)=1, a(1)=2.

n	a(n)
0	1
1	2
2	3
3	4
4	6
5	8
6	11
7	15
8	19
9	24
10	30
11	37
12	45
13	53
14	62
15	72
16	83
17	95
18	108
19	122
20	137
21	153
22	169
23	186
24	204
25	223
26	243
27	264
28	286
29	309
30	333
31	358
32	384
33	411
34	439
35	468
36	498
37	529
38	561
39	593
40	626
41	660
42	695
43	731
44	768
45	806
46	845
47	885
48	926
49	968
50	1011
51	1055
52	1100
53	1146
54	1193
55	1241

[1, 2, 3, 4, 6, 8, 11, 15, 19, 24, 30, 37, 45, 53, 62, 72, 83, 95, 108, 122, 137, 153, 169, 186, 204, 223, 243, 264, 286, 309, 333, 358, 384, 411, 439, 468, 498, 529, 561, 593, 626, 660, 695, 731, 768, 806, 845, 885, 926, 968, 1011, 1055, 1100, 1146, 1193, 1241]

cp's OEIS Frontend

A127419 Recurrence: a(n) = a(n-1) + floor( (sqrt(8 * a(n-1) - 7) - 1)/2 ) for n>=2 with a(0)=1, a(1)=2.

Table of values

List of values