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A301455 as a simple table

na(n)
01
11
24
316
474
5360
61840
79698
852409
9288697
101615275
119153850
1252434770
13303104532
141765920785
1510358843904
1661129390652
17362650003202
182161590275029
1912938838382316
2077745063802045
21468760264760369
222835272729215565
2317198394229862818
24104598950726341920
25637709136315071504

[1,1,4,16,74,360,1840,9698,52409,288697,1615275,
 9153850,52434770,303104532,1765920785,10358843904,
 61129390652,362650003202,2161590275029,
 12938838382316,77745063802045,468760264760369,
 2835272729215565,17198394229862818,
 104598950726341920,637709136315071504]