A027418
formatted as a simple table:
n
a(n)
1
0
2
2
3
7
4
20
5
54
6
143
7
376
8
986
9
2583
10
6764
11
17710
12
46367
13
121392
14
317810
[0,2,7,20,54,143,376,986,2583,6764,17710,46367, 121392,317810]
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(
njas@research.att.com
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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.
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