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A001004 as a simple table

n a(n)
0 1
1 1
2 2
3 3
4 9
5 20
6 75
7 262
8 1117
9 4783
10 21971
11 102249
12 489077
13 2370142
14 11654465
15 57916324
16 290693391
17 1471341341
18 7504177738
19 38532692207
20 199076194985
21 1034236705992
22 5400337050086
23 28329240333758
24 149244907249629

[1,1,2,3,9,20,75,262,1117,4783,21971,102249,
 489077,2370142,11654465,57916324,290693391,
 1471341341,7504177738,38532692207,199076194985,
 1034236705992,5400337050086,28329240333758,
 149244907249629]

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Last modified January 19 18:27 EST 2019. Contains 319309 sequences. (Running on oeis4.)