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A001638 as a simple table

na(n)
04
11
21
34
49
511
616
729
849
976
10121
11199
12324
13521
14841
151364
162209
173571
185776
199349
2015129
2124476
2239601
2364079
24103684
25167761
26271441
27439204
28710649
291149851
301860496
313010349
324870849
337881196
3412752041
3520633239
3633385284
3754018521
3887403801

[4,1,1,4,9,11,16,29,49,76,121,199,324,521,841,
 1364,2209,3571,5776,9349,15129,24476,39601,64079,
 103684,167761,271441,439204,710649,1149851,
 1860496,3010349,4870849,7881196,12752041,20633239,
 33385284,54018521,87403801]