A037120 - OEIS

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A037120 as a simple table

n	a(n)
0	3
1	136
2	68
3	34
4	17
5	766
6	383
7	17236
8	8618
9	4309
10	193906
11	96953
12	4362886
13	2181443
14	98164936
15	49082468
16	24541234
17	12270617
18	552177766
19	276088883
20	12423999736
21	6211999868
22	3105999934
23	1552999967

[3,136,68,34,17,766,383,17236,8618,4309,193906, 96953,4362886,2181443,98164936,49082468,24541234, 12270617,552177766,276088883,12423999736, 6211999868,3105999934,1552999967]