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A303041 as a simple table

na(n)
14
26
314
428
556
6150
7360
8828
91906
104628
1110972
1225850
1360948
14145152
15343870
16814072
171927632
184573086
1910836712
2025678860
2160851842
22144253956
23341881772
24810275098
251920403380
264551789280
2710788216718
2825569422984
2960602792000

[4,6,14,28,56,150,360,828,1906,4628,10972,25850,
 60948,145152,343870,814072,1927632,4573086,
 10836712,25678860,60851842,144253956,341881772,
 810275098,1920403380,4551789280,10788216718,
 25569422984,60602792000]