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A014537 as a simple table

na(n)
14
231
3227
41674
512367
691380
7675214
84989191
936865412
10272400600
112012783315
1214872568831
13109894245429
14812014744422
156000022499693
1644334502845080
17327590128640500
182420581837980561
1917885814992891026

[4,31,227,1674,12367,91380,675214,4989191,
 36865412,272400600,2012783315,14872568831,
 109894245429,812014744422,6000022499693,
 44334502845080,327590128640500,2420581837980561,
 17885814992891026]