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A022587 formatted as a simple table:

n a(n)
0 1
1 22
2 253
3 2046
4 13134
5 71368
6 341275
7 1473494
8 5848810
9 21628002
10 75261384
11 248403586
12 782547909
13 2365168542
14 6887441198
15 19393122562
16 52959869787
17 140631776582
18 363943223941
19 919706094494
20 2273411319069

[1,22,253,2046,13134,71368,341275,1473494,5848810,
 21628002,75261384,248403586,782547909,2365168542,
 6887441198,19393122562,52959869787,140631776582,
 363943223941,919706094494,2273411319069]

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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