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A201157 as a simple table

n a(n)
1 0
2 5
3 15
4 40
5 105
6 275
7 720
8 1885
9 4935
10 12920
11 33825
12 88555
13 231840
14 606965
15 1589055
16 4160200
17 10891545
18 28514435
19 74651760
20 195440845
21 511670775
22 1339571480
23 3507043665
24 9181559515
25 24037634880
26 62931345125
27 164756400495
28 431337856360
29 1129257168585

[0,5,15,40,105,275,720,1885,4935,12920,33825,
 88555,231840,606965,1589055,4160200,10891545,
 28514435,74651760,195440845,511670775,1339571480,
 3507043665,9181559515,24037634880,62931345125,
 164756400495,431337856360,1129257168585]

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Last modified June 16 20:32 EDT 2021. Contains 345069 sequences. (Running on oeis4.)