A252771 - OEIS

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A252771 as a simple table

n	a(n)
1	234
2	1028
3	4687
4	22295
5	105956
6	507049
7	2429173
8	11652188
9	55960799
10	268783174
11	1291581364
12	6207376902
13	29836567197
14	143422264585
15	689472936242
16	3314565767875
17	15934867914351
18	76608704638459
19	368308600684650

[234,1028,4687,22295,105956,507049,2429173, 11652188,55960799,268783174,1291581364,6207376902, 29836567197,143422264585,689472936242, 3314565767875,15934867914351,76608704638459, 368308600684650]