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A148741 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 26
5 80
6 324
7 1150
8 4908
9 18964
10 83715
11 341998
12 1545368
13 6563356
14 30163671
15 131790446
16 613435908
17 2738122567
18 12871074729
19 58410682449
20 276719975340
21 1272372258459
22 6065901435994
23 28187798326093
24 135077703165596
25 633152138248192
26 3047152900049867
27 14385841999184273
28 69484774027121302

[1,1,3,7,26,80,324,1150,4908,18964,83715,341998,
 1545368,6563356,30163671,131790446,613435908,
 2738122567,12871074729,58410682449,276719975340,
 1272372258459,6065901435994,28187798326093,
 135077703165596,633152138248192,3047152900049867,
 14385841999184273,69484774027121302]

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Last modified November 26 09:02 EST 2014. Contains 250021 sequences.