A277209 - OEIS

A277209 as a simple table

n	a(n)
0	0
1	1
2	3
3	6
4	10
5	15
6	21
7	28
8	36
9	45
10	56
11	78
12	111
13	155
14	210
15	276
16	353
17	441
18	540
19	651
20	873
21	1206
22	1650
23	2205
24	2871
25	3648
26	4536
27	5535
28	6646
29	8868
30	12201
31	16645
32	22200
33	28866
34	36643
35	45531
36	55530
37	66641
38	88863
39	122196
40	166640
41	222195
42	288861
43	366638
44	455526
45	555525
46	666636
47	888858
48	1222191
49	1666635
50	2222190

[0,1,3,6,10,15,21,28,36,45,56,78,111,155,210,276, 353,441,540,651,873,1206,1650,2205,2871,3648,4536, 5535,6646,8868,12201,16645,22200,28866,36643, 45531,55530,66641,88863,122196,166640,222195, 288861,366638,455526,555525,666636,888858,1222191, 1666635,2222190]