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A172231 as a simple table

n a(n)
1 0
2 2
3 174
4 1998
5 10741
6 38438
7 107004
8 251354
9 522528
10 990816
11 1748883
12 2914894
13 4635639
14 7089658
15 10490366
16 15089178
17 21178634
18 29095524
19 39224013
20 51998766

[0,2,174,1998,10741,38438,107004,251354,522528,
 990816,1748883,2914894,4635639,7089658,10490366,
 15089178,21178634,29095524,39224013,51998766]

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Last modified November 24 12:07 EST 2014. Contains 249898 sequences.