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A051474 as a simple table

na(n)
02
113
233
313
4151
5151
660
71208
860
9251
107304
1144117
1278095
1344117
147304
15251
1623920
17227596
18655177
19655177
20227596
2123920
221018
231101744
244869057
257862124
264869057
271101744
281018
2933159237
3081256143
3181256143
3233159237
334089
34739863

[2,13,33,13,151,151,60,1208,60,251,7304,44117,
 78095,44117,7304,251,23920,227596,655177,655177,
 227596,23920,1018,1101744,4869057,7862124,4869057,
 1101744,1018,33159237,81256143,81256143,33159237,
 4089,739863]