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A270873 as a simple table

n a(n)
0 21
1 7668
2 75545
3 545730
4 3015021
5 13239896
6 48243393
7 151298070
8 420233285
9 1056651996
10 2446142121
11 5282430218
12 10751650845
13 20796493440
14 38483939921
15 68504620446
16 117836491893
17 196610583620
18 319221957945
19 505734798546
20 783636668621
21 1190003472168

[21,7668,75545,545730,3015021,13239896,48243393,
 151298070,420233285,1056651996,2446142121,
 5282430218,10751650845,20796493440,38483939921,
 68504620446,117836491893,196610583620,
 319221957945,505734798546,783636668621,
 1190003472168]

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Last modified April 19 15:34 EDT 2024. Contains 371794 sequences. (Running on oeis4.)