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A339600 as a simple table

na(n)
01
11
23
36
414
534
676
7172
8404
9928
102112
114880
1211256
1325784
1459288
15136584
16313800
17721096
181659176
193815144
208769320
2120166568
2246375784
23106621992
24245160040
25563747880
261296231400

[1,1,3,6,14,34,76,172,404,928,2112,4880,11256,
 25784,59288,136584,313800,721096,1659176,3815144,
 8769320,20166568,46375784,106621992,245160040,
 563747880,1296231400]