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Search: id:A138816
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| A138816 |
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Concatenation of initial digit of n-th Mersenne prime A000668(n), initial digit of n-th even superperfect number A061652(n) and initial digit of n-th perfect number A000396(n). |
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+0
7
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| 326, 742, 314, 168, 843, 168, 521, 212, 212, 631, 181, 181
(list; graph; listen)
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