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A037571 as a simple table

n a(n)
1 2
2 13
3 80
4 482
5 2893
6 17360
7 104162
8 624973
9 3749840
10 22499042
11 134994253
12 809965520
13 4859793122
14 29158758733
15 174952552400
16 1049715314402
17 6298291886413
18 37789751318480
19 226738507910882
20 1360431047465293

[2,13,80,482,2893,17360,104162,624973,3749840,
 22499042,134994253,809965520,4859793122,
 29158758733,174952552400,1049715314402,
 6298291886413,37789751318480,226738507910882,
 1360431047465293]

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Last modified January 19 03:18 EST 2020. Contains 331031 sequences. (Running on oeis4.)