A249887 - OEIS

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A249887 as a simple table

n	a(n)
1	35
2	4019
3	118638
4	1599494
5	12991337
6	74439217
7	331379292
8	1219778604
9	3872511183
10	10923962159
11	27981170954
12	66148387890
13	146141454485
14	304712555117
15	604328255416
16	1147307969496
17	2095939712763
18	3700448828331

[35,4019,118638,1599494,12991337,74439217, 331379292,1219778604,3872511183,10923962159, 27981170954,66148387890,146141454485,304712555117, 604328255416,1147307969496,2095939712763, 3700448828331]