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A259741 as a simple table

n a(n)
1 265
2 760
3 3480
4 10570
5 35036
6 110886
7 416107
8 1244504
9 4489732
10 13887332
11 50550272
12 153892178
13 560073447
14 1715846404
15 6236321603
16 19065593974
17 69365627376
18 212174735776
19 771528061749
20 2359839029908
21 8583078813482

[265,760,3480,10570,35036,110886,416107,1244504,
 4489732,13887332,50550272,153892178,560073447,
 1715846404,6236321603,19065593974,69365627376,
 212174735776,771528061749,2359839029908,
 8583078813482]

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Last modified December 4 15:16 EST 2023. Contains 367563 sequences. (Running on oeis4.)