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A304626 as a simple table

na(n)
01
10
21
310
447
5201
6849
73578
815147
964516
10276268
111188342
125130987
1322226036
1496543989
15420368843
161834203939
178018057328
1835107961157
19153950675566
20675978772306
212971700764920
2213078268135661
2357613905606250
24254038914924767
251121081799217206
264951199308679965

[1,0,1,10,47,201,849,3578,15147,64516,276268,
 1188342,5130987,22226036,96543989,420368843,
 1834203939,8018057328,35107961157,153950675566,
 675978772306,2971700764920,13078268135661,
 57613905606250,254038914924767,1121081799217206,
 4951199308679965]