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A250801 as a simple table

n a(n)
1 140
2 490
3 1430
4 3776
5 9258
6 21610
7 48600
8 106426
9 228342
10 482496
11 1007546
12 2084962
13 4284032
14 8754018
15 17810278
16 36111264
17 73018218
18 147325946
19 296740456
20 596862762
21 1199199990
22 2407260800
23 4828861690
24 9680929586
25 19399411088

[140,490,1430,3776,9258,21610,48600,106426,228342,
 482496,1007546,2084962,4284032,8754018,17810278,
 36111264,73018218,147325946,296740456,596862762,
 1199199990,2407260800,4828861690,9680929586,
 19399411088]

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)