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A019520 as a simple table

n a(n)
1 2
2 24
3 246
4 2468
5 246810
6 24681012
7 2468101214
8 246810121416
9 24681012141618
10 2468101214161820
11 246810121416182022
12 24681012141618202224
13 2468101214161820222426
14 246810121416182022242628
15 24681012141618202224262830
16 2468101214161820222426283032 

[2,24,246,2468,246810,24681012,2468101214,
 246810121416,24681012141618,2468101214161820,
 246810121416182022,24681012141618202224,
 2468101214161820222426,246810121416182022242628,
 24681012141618202224262830,
 2468101214161820222426283032]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)