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A155299 as a simple table

na(n)
51
67
719
837
9100
10478
113236
1219635
13120080
14957011
1510308520
16134839273
171943304769
1832282816021
19657583832803
2016484816876989

[1,7,19,37,100,478,3236,19635,120080,957011,
 10308520,134839273,1943304769,32282816021,
 657583832803,16484816876989]