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A001933 as a simple table

na(n)
12
21
34
47
524
662
7216
8710
92570
109215
1134146
12126853
13477182
141802673
156853152
1626153758
17100215818
18385226201
191485248464
205741275753
2122246121356
2286383454582
23336094015456
241309998396933
255114454089528
2619998173763831
2778306021876974
28307022186132259
291205243906123956
304736694016531135

[2,1,4,7,24,62,216,710,2570,9215,34146,126853,
 477182,1802673,6853152,26153758,100215818,
 385226201,1485248464,5741275753,22246121356,
 86383454582,336094015456,1309998396933,
 5114454089528,19998173763831,78306021876974,
 307022186132259,1205243906123956,4736694016531135]