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A307399 as a simple table

n a(n)
0 1
1 1
2 4
3 14
4 60
5 262
6 1218
7 5798
8 28364
9 141239
10 714532
11 3660098
12 18949830
13 98997082
14 521218206
15 2762807736
16 14731968812
17 78968221213
18 425282844540
19 2299997984844
20 12485972925500
21 68015653648096
22 371666798915578
23 2036765196573550
24 11190993772943502
25 61637787236407747

[1,1,4,14,60,262,1218,5798,28364,141239,714532,
 3660098,18949830,98997082,521218206,2762807736,
 14731968812,78968221213,425282844540,
 2299997984844,12485972925500,68015653648096,
 371666798915578,2036765196573550,
 11190993772943502,61637787236407747]

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)