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A207776 as a simple table

n a(n)
1 21
2 441
3 972
4 7164
5 43264
6 195160
7 1246206
8 7381202
9 35627804
10 220514498
11 1274712127
12 6417933773
13 38976638418
14 221650017452
15 1149943284883
16 6878942092623
17 38712906007620
18 205352839927648
19 1212860472464769

[21,441,972,7164,43264,195160,1246206,7381202,
 35627804,220514498,1274712127,6417933773,
 38976638418,221650017452,1149943284883,
 6878942092623,38712906007620,205352839927648,
 1212860472464769]

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)