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A000628 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 2
5 3
6 5
7 11
8 24
9 55
10 136
11 345
12 900
13 2412
14 6563
15 18127
16 50699
17 143255
18 408429
19 1173770
20 3396844
21 9892302
22 28972080
23 85289390
24 252260276
25 749329719
26 2234695030
27 6688893605
28 20089296554
29 60526543480
30 182896187256
31 554188210352
32 1683557607211
33 5126819371356
34 15647855317080
35 47862049187447
36 146691564302648
37 450451875783866
38 1385724615285949

[1,1,1,1,2,3,5,11,24,55,136,345,900,2412,6563,
 18127,50699,143255,408429,1173770,3396844,9892302,
 28972080,85289390,252260276,749329719,2234695030,
 6688893605,20089296554,60526543480,182896187256,
 554188210352,1683557607211,5126819371356,
 15647855317080,47862049187447,146691564302648,
 450451875783866,1385724615285949]

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Last modified November 19 09:24 EST 2018. Contains 317348 sequences. (Running on oeis4.)