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A026884 as a simple table

na(n)
21
36
429
5132
6591
72648
811970
954818
10254868
111204042
125779861
1328178306
14139394333
15698911166
163547422416
1718204441884
1894339586414
19493148411592
202597699326194
2113776442755524
2273498738275926
23394203045846692

[1,6,29,132,591,2648,11970,54818,254868,1204042,
 5779861,28178306,139394333,698911166,3547422416,
 18204441884,94339586414,493148411592,
 2597699326194,13776442755524,73498738275926,
 394203045846692]