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A022521 as a simple table

n a(n)
0 1
1 31
2 211
3 781
4 2101
5 4651
6 9031
7 15961
8 26281
9 40951
10 61051
11 87781
12 122461
13 166531
14 221551
15 289201
16 371281
17 469711
18 586531
19 723901
20 884101
21 1069531
22 1282711
23 1526281
24 1803001
25 2115751
26 2467531

[1,31,211,781,2101,4651,9031,15961,26281,40951,
 61051,87781,122461,166531,221551,289201,371281,
 469711,586531,723901,884101,1069531,1282711,
 1526281,1803001,2115751,2467531]

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Last modified April 23 09:22 EDT 2024. Contains 371905 sequences. (Running on oeis4.)