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A270661 as a simple table

na(n)
01
15
214
345
4164
5662
62862
712957
860590
9290218
101416216
117014714
1235172968
13178180968
14910542696
154688140189
1624296295636
17126640986410
18663465473910
193491674292814
2018450954171742
2197859178176632
22520755520521982
232779633126026210

[1,5,14,45,164,662,2862,12957,60590,290218,
 1416216,7014714,35172968,178180968,910542696,
 4688140189,24296295636,126640986410,663465473910,
 3491674292814,18450954171742,97859178176632,
 520755520521982,2779633126026210]