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A090371 as a simple table

na(n)
11
23
36
420
560
6291
71310
86975
937746
10215602
111262874
127611156
1346814132
14293447817
151868710728
1612068905911
1778913940784
18521709872895
193483289035186
2023464708686960
21159346213738020
221090073011199451
237507285094455566
2452021636161126702

[1,3,6,20,60,291,1310,6975,37746,215602,1262874,
 7611156,46814132,293447817,1868710728,12068905911,
 78913940784,521709872895,3483289035186,
 23464708686960,159346213738020,1090073011199451,
 7507285094455566,52021636161126702]