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A291555 as a simple table

n a(n)
1 0
2 1
3 4
4 15
5 40
6 57
7 76
8 108
9 146
10 194
11 258
12 336
13 447
14 544
15 663
16 807
17 970
18 1132
19 1333
20 1567 

[0,1,4,15,40,57,76,108,146,194,258,336,447,544,
 663,807,970,1132,1333,1567]

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Last modified July 19 12:37 EDT 2024. Contains 374394 sequences. (Running on oeis4.)