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A151284 formatted as a simple table:

n a(n)
0 1
1 2
2 6
3 20
4 70
5 254
6 942
7 3550
8 13532
9 52030
10 201386
11 783560
12 3061442
13 12001804
14 47181278
15 185904220
16 733908634
17 2901998092
18 11490757796
19 45552262860
20 180762964146
21 717939220774
22 2853611232902
23 11349816190552
24 45168339253888
25 179845805435900
26 716409551285034
27 2854926106932244

[1,2,6,20,70,254,942,3550,13532,52030,201386,
 783560,3061442,12001804,47181278,185904220,
 733908634,2901998092,11490757796,45552262860,
 180762964146,717939220774,2853611232902,
 11349816190552,45168339253888,179845805435900,
 716409551285034,2854926106932244]

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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