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A089622 as a simple table

na(n)
13
27
332
4263
53136
646669
7823560
816777235
9387420512
1010000000029
11285311670642
128916100448293
13302875106592294
1411112006825558059
15437893890380859422
1618446744073709551669
17827240261886336764236
1839346408075296537575485
191978419655660313589124046

[3,7,32,263,3136,46669,823560,16777235,387420512,
 10000000029,285311670642,8916100448293,
 302875106592294,11112006825558059,
 437893890380859422,18446744073709551669,
 827240261886336764236,39346408075296537575485,
 1978419655660313589124046]