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A159557 as a simple table

na(n)
34
46
526
680
7246
8810
92704
109252
1132066
12112720
13400024
141432860
155170604
1618784170
1768635478
18252088496
19930138522
203446167860
2112815663844
2247820447028
23178987624514
24671825133648
252528212128776
269536895064400

[4,6,26,80,246,810,2704,9252,32066,112720,400024,
 1432860,5170604,18784170,68635478,252088496,
 930138522,3446167860,12815663844,47820447028,
 178987624514,671825133648,2528212128776,
 9536895064400]