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A157054 as a simple table

n a(n)
1 2
2 30
3 252
4 1500
5 7002
6 27174
7 91112
8 271224
9 731502
10 1815506
11 4197468
12 9129276
13 18827718
14 37060506
15 70006512
16 127485584
17 224676522
18 384468534
19 640622012
20 1041949020
21 1657762722
22 2584888350
23 3956576472
24 5953712520
25 8818775030
26 12873059082
27 18537751260

[2,30,252,1500,7002,27174,91112,271224,731502,
 1815506,4197468,9129276,18827718,37060506,
 70006512,127485584,224676522,384468534,640622012,
 1041949020,1657762722,2584888350,3956576472,
 5953712520,8818775030,12873059082,18537751260]

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Last modified May 13 16:16 EDT 2024. Contains 372522 sequences. (Running on oeis4.)