A024402 - OEIS

A024402 as a simple table

n	a(n)
1	3
2	20
3	63
4	150
5	304
6	552
7	926
8	1460
9	2197
10	3180
11	4460
12	6090
13	8128
14	10639
15	13689
16	17350
17	21699
18	26817
19	32790
20	39706
21	47662
22	56755
23	67090
24	78774
25	91919
26	106644
27	123069
28	141320
29	161528
30	183828
31	208360
32	235266
33	264697
34	296804
35	331746
36	369683
37	410784

[3,20,63,150,304,552,926,1460,2197,3180,4460,6090, 8128,10639,13689,17350,21699,26817,32790,39706, 47662,56755,67090,78774,91919,106644,123069, 141320,161528,183828,208360,235266,264697,296804, 331746,369683,410784]