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A006419 as a simple table

na(n)
00
11
27
337
4176
5794
63473
714893
863004
9263950
101097790
114540386
1218696432
1376717268
14313889477
151281220733
165219170052
1721224674118
1886188320962
19349550141078
201416102710912
215731427140268
2223177285611082
2393655986978002
24378195990166136
251526289367335244

[0,1,7,37,176,794,3473,14893,63004,263950,1097790,
 4540386,18696432,76717268,313889477,1281220733,
 5219170052,21224674118,86188320962,349550141078,
 1416102710912,5731427140268,23177285611082,
 93655986978002,378195990166136,1526289367335244]