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A089580 formatted as a simple table:

n a(n)
1 3
2 15
3 49
4 143
5 406
6 1174
7 3507
8 10674
9 32965
10 102716
11 321797
12 1011533
13 3186389
14 10050743
15 31730134
16 100228040
17 316713623
18 1001037546
19 3164497349
20 10004755374
21 31632975598
22 100021893194
23 316274794666
24 1000101078148

[3,15,49,143,406,1174,3507,10674,32965,102716,
 321797,1011533,3186389,10050743,31730134,
 100228040,316713623,1001037546,3164497349,
 10004755374,31632975598,100021893194,316274794666,
 1000101078148]

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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