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A199316 as a simple table

n a(n)
0 12
1 56
2 276
3 1376
4 6876
5 34376
6 171876
7 859376
8 4296876
9 21484376
10 107421876
11 537109376
12 2685546876
13 13427734376
14 67138671876
15 335693359376
16 1678466796876
17 8392333984376
18 41961669921876
19 209808349609376
20 1049041748046876

[12,56,276,1376,6876,34376,171876,859376,4296876,
 21484376,107421876,537109376,2685546876,
 13427734376,67138671876,335693359376,
 1678466796876,8392333984376,41961669921876,
 209808349609376,1049041748046876]

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Last modified January 23 20:47 EST 2022. Contains 350515 sequences. (Running on oeis4.)