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A374320 as a simple table

na(n)
01
11
21
31
44
516
646
7106
8316
91604
108156
1133716
12125456
131073216
1410233224
1569873896
16364469561
172296961801
1819124734801
19147200743489
20960313414036
216422446261456
2252845891370966
23461844834503746
243779922654292324
2531131912140021452
26296987899271509252

[1,1,1,1,4,16,46,106,316,1604,8156,33716,125456,
 1073216,10233224,69873896,364469561,2296961801,
 19124734801,147200743489,960313414036,
 6422446261456,52845891370966,461844834503746,
 3779922654292324,31131912140021452,
 296987899271509252]