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A267685 as a simple table

na(n)
01
14
227
3119
4495
52015
68127
732639
8130815
9523775
102096127
118386559
1233550335
13134209535
14536854527
152147450879
168589869055
1734359607295
18137438691327
19549755289599
202199022206975
218796090925055
2235184367894527
23140737479966719
24562949936644095

[1,4,27,119,495,2015,8127,32639,130815,523775,
 2096127,8386559,33550335,134209535,536854527,
 2147450879,8589869055,34359607295,137438691327,
 549755289599,2199022206975,8796090925055,
 35184367894527,140737479966719,562949936644095]