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A007785 as a simple table

n a(n)
0 1
1 1
2 2
3 17
4 306
5 10828
6 654857
7 63019177
8 9183937890
9 1953896126383
10 589909767142505
11 247074213707554144
12 140902072248206260266
13 107704589610917073318533
14 108877374411946899963718973
15 143864444783939220165210185294
16 245934054410000090878614435736720

[1,1,2,17,306,10828,654857,63019177,9183937890,
 1953896126383,589909767142505,247074213707554144,
 140902072248206260266,107704589610917073318533,
 108877374411946899963718973,
 143864444783939220165210185294,
 245934054410000090878614435736720]

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Last modified February 18 19:50 EST 2019. Contains 320262 sequences. (Running on oeis4.)