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A321172 as a simple table

na(n)
21
31
40
51
62
76
81
90
1014
110
121
134
1437
15154
161072
171
180
1992
200
215320
220
231
248
25236
261696
2732675
28301384
294638576
301
310
32596
330
34175294
350
3649483138
370
381
3916
401517
4118684
421024028
4317066492
44681728204
4513916993782
46467260456608

[1,1,0,1,2,6,1,0,14,0,1,4,37,154,1072,1,0,92,0,
 5320,0,1,8,236,1696,32675,301384,4638576,1,0,596,
 0,175294,0,49483138,0,1,16,1517,18684,1024028,
 17066492,681728204,13916993782,467260456608]