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A206780 as a simple table

na(n)
17
249
3230
41020
54120
616109
761003
8227197
9834806
103041436
1111009856
1239680145
13142545383
14510891025
151827957230
166532356532
1723322885552
1883216416445
19296774223739
201058010185133
213770863749966
2213437211488900
2347875876583016

[7,49,230,1020,4120,16109,61003,227197,834806,
 3041436,11009856,39680145,142545383,510891025,
 1827957230,6532356532,23322885552,83216416445,
 296774223739,1058010185133,3770863749966,
 13437211488900,47875876583016]