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A077849 as a simple table

n a(n)
0 1
1 3
2 8
3 21
4 54
5 138
6 352
7 897
8 2285
9 5820
10 14823
11 37752
12 96148
13 244872
14 623645
15 1588311
16 4045140
17 10302237
18 26237926
19 66823230
20 170186624
21 433434405
22 1103878665
23 2811378360
24 7160069791
25 18235396608
26 46442241368
27 118279949136
28 301237536249
29 767197263003

[1,3,8,21,54,138,352,897,2285,5820,14823,37752,
 96148,244872,623645,1588311,4045140,10302237,
 26237926,66823230,170186624,433434405,1103878665,
 2811378360,7160069791,18235396608,46442241368,
 118279949136,301237536249,767197263003]

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Last modified July 12 10:20 EDT 2020. Contains 335657 sequences. (Running on oeis4.)