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A006720 as a simple table

na(n)
01
11
21
31
42
53
67
723
859
9314
101529
118209
1283313
13620297
147869898
15126742987
161687054711
1747301104551
181123424582771
1932606721084786
201662315215971057
2161958046554226593
224257998884448335457
23334806306946199122193
2423385756731869683322514
253416372868727801226636179

[1,1,1,1,2,3,7,23,59,314,1529,8209,83313,620297,
 7869898,126742987,1687054711,47301104551,
 1123424582771,32606721084786,1662315215971057,
 61958046554226593,4257998884448335457,
 334806306946199122193,23385756731869683322514,
 3416372868727801226636179]