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A254856 as a simple table

na(n)
11
22
315
440
5377
61026
79775
826624
9253761
10691186
116587999
1217944200
13171034201
14465858002
154440301215
1612094363840
17115276797377
18313987601826
192992756430575
208151583283624
2177696390397561
22211627177772386
232017113393905999
245494155038798400

[1,2,15,40,377,1026,9775,26624,253761,691186,
 6587999,17944200,171034201,465858002,4440301215,
 12094363840,115276797377,313987601826,
 2992756430575,8151583283624,77696390397561,
 211627177772386,2017113393905999,5494155038798400]