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  1. a=->n,d=45{d<5?0:a[n,d-=2]-d*4[2**d%d]*(a[n/=d,d]+n*~n/2)}
  2. p a[10**5],a[10**9]
Success #stdin #stdout 4.73s 7408KB
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3581315490
358280603722753474
https://ideone.com/glewxt
Golf Answer of CodeIQ q1560
language:
Ruby (ruby 2.5.5)
created:
10 years ago
visibility:
secret

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