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A278306 as a simple table

na(n)
1126
211486
3986014
479562696
56345491150
6507575149862
738819080346585
82710823731820118
9169682177514345615
109515799841809545361
11481274130722917682825
1222134553939263522315031
13933117878015049935514941

[126,11486,986014,79562696,6345491150,
 507575149862,38819080346585,2710823731820118,
 169682177514345615,9515799841809545361,
 481274130722917682825,22134553939263522315031,
 933117878015049935514941]