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A023607 as a simple table

n a(n)
0 0
1 1
2 4
3 9
4 20
5 40
6 78
7 147
8 272
9 495
10 890
11 1584
12 2796
13 4901
14 8540
15 14805
16 25552
17 43928
18 75258
19 128535
20 218920
21 371931
22 630454
23 1066464
24 1800600
25 3034825
26 5106868
27 8580897
28 14398412
29 24129160
30 40388070
31 67527579
32 112786496
33 188195271

[0,1,4,9,20,40,78,147,272,495,890,1584,2796,4901,
 8540,14805,25552,43928,75258,128535,218920,371931,
 630454,1066464,1800600,3034825,5106868,8580897,
 14398412,24129160,40388070,67527579,112786496,
 188195271]

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Last modified May 7 17:41 EDT 2024. Contains 372312 sequences. (Running on oeis4.)