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A000634 as a simple table

na(n)
21
32
46
514
638
797
8260
9688
101856
114994
1213550
1336791
14100302
15273824
16749316
172053247
185635266
1915484532
2042599485
21117312742
22323373356
23892139389
242463252315
256806148956
2618818714543
2752065725034
28144135111504
29399232819042
301106385615943

[1,2,6,14,38,97,260,688,1856,4994,13550,36791,
 100302,273824,749316,2053247,5635266,15484532,
 42599485,117312742,323373356,892139389,2463252315,
 6806148956,18818714543,52065725034,144135111504,
 399232819042,1106385615943]