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A054444 as a simple table

n a(n)
0 1
1 5
2 20
3 71
4 235
5 744
6 2285
7 6865
8 20284
9 59155
10 170711
11 488400
12 1387225
13 3916061
14 10996580
15 30737759
16 85573315
17 237387960
18 656451269
19 1810142185
20 4978643596
21 13661617195
22 37409025455
23 102238082976
24 278920277425
25 759695287349

[1,5,20,71,235,744,2285,6865,20284,59155,170711,
 488400,1387225,3916061,10996580,30737759,85573315,
 237387960,656451269,1810142185,4978643596,
 13661617195,37409025455,102238082976,278920277425,
 759695287349]

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Last modified January 23 03:08 EST 2019. Contains 319370 sequences. (Running on oeis4.)