A300274 - OEIS

A300274 as a simple table

n	a(n)
1	2
2	2
3	6
4	10
5	22
6	30
7	62
8	86
9	146
10	206
11	342
12	454
13	726
14	974
15	1442
16	1962
17	2862
18	3762
19	5398
20	7094
21	9834
22	12942
23	17726
24	22938
25	31042
26	40094
27	53254
28	68518
29	90246
30	114914
31	150142
32	190550
33	245906
34	310942
35	398554
36	500474
37	637590
38	797534
39	1007714
40	1255850
41	1578526
42	1956786

[2,2,6,10,22,30,62,86,146,206,342,454,726,974, 1442,1962,2862,3762,5398,7094,9834,12942,17726, 22938,31042,40094,53254,68518,90246,114914,150142, 190550,245906,310942,398554,500474,637590,797534, 1007714,1255850,1578526,1956786]