A164520 - OEIS

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A164520 as a simple table

n	a(n)
1	274627
2	328511
3	1860869
4	2146691
5	2924209
6	9129331
7	9938377
8	10503461
9	15438251
10	24642173
11	26730901
12	28372627
13	39651823
14	61629877
15	105823819
16	125751503
17	136590877
18	151419439
19	194104541
20	426957779
21	573856193

[274627,328511,1860869,2146691,2924209,9129331, 9938377,10503461,15438251,24642173,26730901, 28372627,39651823,61629877,105823819,125751503, 136590877,151419439,194104541,426957779,573856193]