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A131721 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 17
5 41
6 100
7 240
8 580
9 1400
10 3380
11 8160
12 19700
13 47560
14 114820
15 277200
16 669220
17 1615640
18 3900500
19 9416640
20 22733780
21 54884200
22 132502180
23 319888560
24 772279300
25 1864447160
26 4501173620
27 10866794400
28 26234762420
29 63336319240

[1,1,3,7,17,41,100,240,580,1400,3380,8160,19700,
 47560,114820,277200,669220,1615640,3900500,
 9416640,22733780,54884200,132502180,319888560,
 772279300,1864447160,4501173620,10866794400,
 26234762420,63336319240]

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Last modified March 29 02:16 EDT 2024. Contains 371264 sequences. (Running on oeis4.)