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A206144 as a simple table

n a(n)
1 60
2 246
3 1122
4 5118
5 23346
6 106494
7 485778
8 2215902
9 10107954
10 46107966
11 210323922
12 959403678
13 4376370546
14 19963045374
15 91062485778
16 415386338142
17 1894806719154
18 8643260919486
19 39426691159122
20 179846933956638

[60,246,1122,5118,23346,106494,485778,2215902,
 10107954,46107966,210323922,959403678,4376370546,
 19963045374,91062485778,415386338142,
 1894806719154,8643260919486,39426691159122,
 179846933956638]

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Last modified December 3 21:14 EST 2016. Contains 278745 sequences.