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A061161 formatted as a simple table:

n a(n)
0 1
1 1
2 13
3 55
4 1235
5 4615
6 55801
7 200343
8 8977475
9 36804235
10 367235363
11 1444888289
12 32062742231
13 120729974115
14 1205864254225
15 5201022002071
16 395884671433315
17 1603069490974835
18 15989295873680415
19 64312573140322525

[1,1,13,55,1235,4615,55801,200343,8977475,
 36804235,367235363,1444888289,32062742231,
 120729974115,1205864254225,5201022002071,
 395884671433315,1603069490974835,
 15989295873680415,64312573140322525]

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.


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