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A171879 as a simple table

na(n)
00
10
21
31
41
51
63
75
89
925
1073
11313
123263
131502337
14278472902914281
1511984387434132924341157279996736444304839056033321

[0,0,1,1,1,1,3,5,9,25,73,313,3263,1502337,
 278472902914281,
 11984387434132924341157279996736444304839056033321\
 ]