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A001910 as a simple table

na(n)
30
41
55
631
7227
81909
918089
10190435
112203319
1227772873
13378673901
145551390471
1587057596075
161453986832381
1725762467303377
18482626240281739
199530573107600319
20197850855756232465
214307357140602486869
2298125321641110663023
232334414826276390013171

[0,1,5,31,227,1909,18089,190435,2203319,27772873,
 378673901,5551390471,87057596075,1453986832381,
 25762467303377,482626240281739,9530573107600319,
 197850855756232465,4307357140602486869,
 98125321641110663023,2334414826276390013171]