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A008270 as a simple table

na(n)
11
220
3507
419552
51113485
688725876
79452410135
81299140690912
9223938108997497
1047323772172058420
1112033854264863090451
123625294706255832787200
131276951433895343148472517

[1,20,507,19552,1113485,88725876,9452410135,
 1299140690912,223938108997497,47323772172058420,
 12033854264863090451,3625294706255832787200,
 1276951433895343148472517]