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A274668 as a simple table

n a(n)
0 1
1 7
2 109
3 2095
4 44401
5 995647
6 23161909
7 552919423
8 13454515585
9 332268466327
10 8302478659069
11 209447296631503
12 5325782947464721
13 136330694520639535
14 3509805380065157989
15 90806156097601965055
16 2359490223343888886785
17 61541525049445532797735
18 1610570872210945422212365

[1,7,109,2095,44401,995647,23161909,552919423,
 13454515585,332268466327,8302478659069,
 209447296631503,5325782947464721,
 136330694520639535,3509805380065157989,
 90806156097601965055,2359490223343888886785,
 61541525049445532797735,1610570872210945422212365]

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Last modified July 5 00:01 EDT 2020. Contains 335457 sequences. (Running on oeis4.)