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A318564 as a simple table

na(n)
11
26
336
4274
52408
624440
7279172
83542798
949354816
10747851112
1112231881948
12214593346534
134016624367288
1479843503990710
151678916979373760
1637215518578700028
17866953456654946948
1821167221410812128266
19540346299720320080828
2014390314687100383124540
21399023209689817997883900

[1,6,36,274,2408,24440,279172,3542798,49354816,
 747851112,12231881948,214593346534,4016624367288,
 79843503990710,1678916979373760,37215518578700028,
 866953456654946948,21167221410812128266,
 540346299720320080828,14390314687100383124540,
 399023209689817997883900]