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A000251 as a simple table

n a(n)
7 1
8 3
9 11
10 29
11 74
12 167
13 367
14 755
15 1515
16 2931
17 5551
18 10263
19 18677
20 33409
21 59024
22 102984
23 177915
24 304458
25 516939
26 871180
27 1458882
28 2428548
29 4021670
30 6627515
31 10874462
32 17770474
33 28932739
34 46943967
35 75925797
36 122433291
37 196879385
38 315759282
39 505168033
40 806290796
41 1284034606
42 2040485004
43 3235965074
44 5121801962
45 8091411114
46 12759606939
47 20085832527
48 31565046053
49 49523414558
50 77575278933
51 121329065354
52 189475663960
53 295465391518
54 460087656595
55 715436020515
56 1110994054004

[1,3,11,29,74,167,367,755,1515,2931,5551,10263,
 18677,33409,59024,102984,177915,304458,516939,
 871180,1458882,2428548,4021670,6627515,10874462,
 17770474,28932739,46943967,75925797,122433291,
 196879385,315759282,505168033,806290796,
 1284034606,2040485004,3235965074,5121801962,
 8091411114,12759606939,20085832527,31565046053,
 49523414558,77575278933,121329065354,189475663960,
 295465391518,460087656595,715436020515,
 1110994054004]

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Last modified May 25 08:35 EDT 2020. Contains 334585 sequences. (Running on oeis4.)