A306968 - OEIS

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A306968 as a simple table

n	a(n)
1	3
2	6
3	19
4	22
5	31
6	51
7	55
8	66
9	94
10	139
11	142
12	159
13	166
14	214
15	235
16	283
17	439
18	534
19	559
20	670
21	874
22	946
23	1726
24	2131
25	2419
26	3559
27	4759

[3,6,19,22,31,51,55,66,94,139,142,159,166,214,235, 283,439,534,559,670,874,946,1726,2131,2419,3559, 4759]