A036237 - OEIS

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A036237 as a simple table

n	a(n)
0	1
1	2
2	5
3	4
4	7
5	10
6	15
7	8
8	11
9	14
10	13
11	28
12	21
13	78
14	17
15	16
16	19
17	22
18	49
19	42
20	23
21	26
22	1577
23	40

[1,2,5,4,7,10,15,8,11,14,13,28,21,78,17,16,19,22, 49,42,23,26,1577,40]