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A303237 as a simple table

na(n)
11
211
318
455
5181
6494
71465
84415
912934
1038423
11114145
12337914
131003161
142976083
158824906
1626185191
1777678573
18230413110
19683562697
202027805127
216015399582
2217845009895
2352937661977
24157040038306
25465863595657
261381994981979

[1,11,18,55,181,494,1465,4415,12934,38423,114145,
 337914,1003161,2976083,8824906,26185191,77678573,
 230413110,683562697,2027805127,6015399582,
 17845009895,52937661977,157040038306,465863595657,
 1381994981979]