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A236782 as a simple table

n a(n)
1 81
2 255
3 770
4 2475
5 7967
6 26320
7 87685
8 296341
9 1009386
10 3469327
11 11995679
12 41723704
13 145746621
14 511140805
15 1798008490
16 6341897735
17 22416736479
18 79385995448
19 281564936853
20 999990174053
21 3555463819754
22 12653797570015

[81,255,770,2475,7967,26320,87685,296341,1009386,
 3469327,11995679,41723704,145746621,511140805,
 1798008490,6341897735,22416736479,79385995448,
 281564936853,999990174053,3555463819754,
 12653797570015]

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Last modified January 25 19:00 EST 2022. Contains 350572 sequences. (Running on oeis4.)