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A294973 as a simple table

n a(n)
0 1
1 3
2 31
3 96
4 223
5 765
6 7873
7 24384
8 56641
9 194307
10 1999711
11 6193440
12 14386591
13 49353213
14 507918721
15 1573109376
16 3654137473
17 12535521795
18 129009355423
19 399563588064
20 928136531551
21 3183973182717
22 32767868358721
23 101487578258880
24 235743024876481
25 808716652888323
26 8322909553759711
27 25777445314167456
28 59877800182094623
29 205410845860451325

[1,3,31,96,223,765,7873,24384,56641,194307,
 1999711,6193440,14386591,49353213,507918721,
 1573109376,3654137473,12535521795,129009355423,
 399563588064,928136531551,3183973182717,
 32767868358721,101487578258880,235743024876481,
 808716652888323,8322909553759711,
 25777445314167456,59877800182094623,
 205410845860451325]

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Last modified September 28 01:20 EDT 2020. Contains 337388 sequences. (Running on oeis4.)