A259246 - OEIS

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A259246 as a simple table

n	a(n)
1	111
2	581
3	2816
4	14425
5	71313
6	361728
7	1803859
8	9106657
9	45601304
10	229700941
11	1152550829
12	5799573000
13	29129216479
14	146507741197
15	736226561792
16	3702139968817
17	18608625262249
18	93565783612448
19	470365315223067

[111,581,2816,14425,71313,361728,1803859,9106657, 45601304,229700941,1152550829,5799573000, 29129216479,146507741197,736226561792, 3702139968817,18608625262249,93565783612448, 470365315223067]