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A278275 as a simple table

n a(n)
1 0
2 4
3 25
4 136
5 839
6 5013
7 30370
8 183403
9 1108525
10 6699034
11 40484839
12 244664745
13 1478598250
14 8935711959
15 54001778309
16 326352531078
17 1972267883095
18 11919137270093
19 72031712514698
20 435314024068379
21 2630762103695997

[0,4,25,136,839,5013,30370,183403,1108525,6699034,
 40484839,244664745,1478598250,8935711959,
 54001778309,326352531078,1972267883095,
 11919137270093,72031712514698,435314024068379,
 2630762103695997]

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)