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A369212 as a simple table

na(n)
01
12
25
315
450
5177
6652
72473
89594
937892
10151846
11615859
122523217
1310427471
1443415259
15181941198
16766841846
173248517320
1813823977350
1959067577266
20253315964424
211089998388418
224704475230340
2320361365646315
2488351705071583
25384280788724692
261675063399090659

[1,2,5,15,50,177,652,2473,9594,37892,151846,
 615859,2523217,10427471,43415259,181941198,
 766841846,3248517320,13823977350,59067577266,
 253315964424,1089998388418,4704475230340,
 20361365646315,88351705071583,384280788724692,
 1675063399090659]