A137980 - OEIS

A137980 as a simple table

n	a(n)
1	4
2	24
3	28
4	90
5	112
6	232
7	310
8	346
9	480
10	492
11	522
12	564
13	592
14	648
15	666
16	690
17	694
18	766
19	802
20	856
21	868
22	900
23	930
24	960
25	990
26	1030
27	1038
28	1060
29	1102
30	1134
31	1212
32	1218
33	1240
34	1264
35	1308
36	1446
37	1522
38	1570
39	1578
40	1704
41	1822
42	1852
43	1858
44	1866
45	1882
46	1896
47	1906
48	1912
49	1978
50	1990

[4,24,28,90,112,232,310,346,480,492,522,564,592, 648,666,690,694,766,802,856,868,900,930,960,990, 1030,1038,1060,1102,1134,1212,1218,1240,1264,1308, 1446,1522,1570,1578,1704,1822,1852,1858,1866,1882, 1896,1906,1912,1978,1990]