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A023903 as a simple table

n a(n)
0 1
1 156
2 4290
3 36036
4 141726
5 449592
6 1098812
7 2417844
8 4575714
9 8556132
10 13981110
11 23250084
12 34902582
13 53549496
14 75168522
15 109953272
16 146737890
17 204766848
18 265082246
19 357073860
20 447493332
21 591649344
22 720098808
23 928421208
24 1118340652
25 1408153188

[1,156,4290,36036,141726,449592,1098812,2417844,
 4575714,8556132,13981110,23250084,34902582,
 53549496,75168522,109953272,146737890,204766848,
 265082246,357073860,447493332,591649344,720098808,
 928421208,1118340652,1408153188]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)