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A150659 as a simple table

n a(n)
0 1
1 2
2 7
3 28
4 122
5 534
6 2444
7 11220
8 52536
9 246840
10 1172104
11 5580649
12 26741260
13 128421666
14 619275234
15 2991804319
16 14494707351
17 70332745402
18 341974970533
19 1664926463193
20 8118358471204
21 39629464167851
22 193684934880890
23 947500660895119
24 4639699212194171
25 22737806937630413
26 111522036284003882

[1,2,7,28,122,534,2444,11220,52536,246840,1172104,
 5580649,26741260,128421666,619275234,2991804319,
 14494707351,70332745402,341974970533,
 1664926463193,8118358471204,39629464167851,
 193684934880890,947500660895119,4639699212194171,
 22737806937630413,111522036284003882]

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Last modified March 28 20:01 EDT 2020. Contains 333103 sequences. (Running on oeis4.)