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A188314 as a simple table

na(n)
01
12
25
316
457
5219
6883
73687
815803
969128
10307363
111385003
126310869
1329028616
14134610771
15628612921
162953640371
1713953726888
1866240021987
19315812059436
201511569447859
217260364084997
2234984937594741
23169073568381936
24819288294835939
253979892232651125
2619377475499900015

[1,2,5,16,57,219,883,3687,15803,69128,307363,
 1385003,6310869,29028616,134610771,628612921,
 2953640371,13953726888,66240021987,315812059436,
 1511569447859,7260364084997,34984937594741,
 169073568381936,819288294835939,3979892232651125,
 19377475499900015]