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A180439 as a simple table

n a(n)
0 1
1 3
2 3
3 3
4 9
5 15
6 33
7 63
8 153
9 219
10 261
11 351
12 585
13 879
14 933
15 1233
16 1401
17 1899
18 2301
19 3111

[1,3,3,3,9,15,33,63,153,219,261,351,585,879,933,
 1233,1401,1899,2301,3111]

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Last modified September 28 17:43 EDT 2020. Contains 337393 sequences. (Running on oeis4.)