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A106681 as a simple table

n a(n)
0 0
1 4
2 13
3 15
4 42
5 56
6 59
7 77
8 93
9 116
10 126
11 138
12 146
13 174
14 214
15 221
16 240
17 245
18 246 

[0,4,13,15,42,56,59,77,93,116,126,138,146,174,214,
 221,240,245,246]

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Last modified March 31 21:40 EDT 2023. Contains 361673 sequences. (Running on oeis4.)