A014700 - OEIS

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A014700 as a simple table

n	a(n)
0	1
1	5
2	55
3	251
4	1160
5	4075
6	13503
7	39025
8	106385
9	266303
10	634523
11	1423885
12	3068221
13	6319228
14	12586625
15	24192381
16	45219809
17	82110565
18	145625490
19	252124434
20	427810236
21	711268950
22	1162164778
23	1865955326

[1,5,55,251,1160,4075,13503,39025,106385,266303, 634523,1423885,3068221,6319228,12586625,24192381, 45219809,82110565,145625490,252124434,427810236, 711268950,1162164778,1865955326]