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A121568 as a simple table

na(n)
21
31
42
55
68
721
834
989
10377
11610
122584
136765
1410946
1528657
16121393
17514229
18832040
193524578
209227465
2114930352
2263245986
23165580141
24701408733
254807526976
2612586269025
2720365011074
2853316291173
2986267571272
30225851433717

[1,1,2,5,8,21,34,89,377,610,2584,6765,10946,28657,
 121393,514229,832040,3524578,9227465,14930352,
 63245986,165580141,701408733,4807526976,
 12586269025,20365011074,53316291173,86267571272,
 225851433717]