A304307 - OEIS

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A304307 as a simple table

n	a(n)
1	16
2	192
3	918
4	4979
5	26548
6	145369
7	795436
8	4370971
9	24051887
10	132494050
11	730216299
12	4025729873
13	22197550824
14	122407487462
15	675046629475
16	3722828907866
17	20531462970265
18	113232481464776
19	624488706933028

[16,192,918,4979,26548,145369,795436,4370971, 24051887,132494050,730216299,4025729873, 22197550824,122407487462,675046629475, 3722828907866,20531462970265,113232481464776, 624488706933028]