A063978 - cp's OEIS frontend

A063978 Sum_{i for which n - i(i-1)/2 >= 0} binomial (n - i(i-1)/2, i).

n	a(n)
0	1
1	2
2	3
3	5
4	8
5	12
6	18
7	27
8	40
9	58
10	83
11	118
12	167
13	235
14	328
15	454
16	624
17	853
18	1161
19	1574
20	2125
21	2856
22	3821
23	5090
24	6754
25	8931
26	11773
27	15474
28	20280
29	26502
30	34533
31	44870
32	58142
33	75145
34	96885
35	124630
36	159973
37	204909
38	261930
39	334143
40	425417
41	540566
42	685576
43	867885
44	1096726
45	1383545
46	1742509
47	2191123
48	2750980

[1, 2, 3, 5, 8, 12, 18, 27, 40, 58, 83, 118, 167, 235, 328, 454, 624, 853, 1161, 1574, 2125, 2856, 3821, 5090, 6754, 8931, 11773, 15474, 20280, 26502, 34533, 44870, 58142, 75145, 96885, 124630, 159973, 204909, 261930, 334143, 425417, 540566, 685576, 867885, 1096726, 1383545, 1742509, 2191123, 2750980]

cp's OEIS Frontend

A063978 Sum_{i for which n - i(i-1)/2 >= 0} binomial (n - i(i-1)/2, i).

Table of values

List of values

cp's OEIS Frontend

A063978 Sum_{i for which n - i*(i-1)/2 >= 0} binomial (n - i*(i-1)/2, i).

Table of values

List of values

A063978 Sum_{i for which n - i(i-1)/2 >= 0} binomial (n - i(i-1)/2, i).