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A090247 as a simple table

n a(n)
0 2
1 26
2 674
3 17498
4 454274
5 11793626
6 306180002
7 7948886426
8 206364867074
9 5357537657498
10 139089614227874
11 3610972432267226
12 93746193624720002
13 2433790061810452826
14 63184795413447053474
15 1640370890687812937498

[2,26,674,17498,454274,11793626,306180002,
 7948886426,206364867074,5357537657498,
 139089614227874,3610972432267226,
 93746193624720002,2433790061810452826,
 63184795413447053474,1640370890687812937498]

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Last modified May 21 15:32 EDT 2019. Contains 323444 sequences. (Running on oeis4.)