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A030986
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3-automorphic numbers ending in 5: final digits of 3*n^2 agree with n.
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1
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5, 75, 875, 6875, 96875, 296875, 4296875, 4296875, 404296875, 9404296875, 39404296875, 639404296875, 6639404296875, 86639404296875, 86639404296875, 2086639404296875, 52086639404296875
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OFFSET
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1,1
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COMMENTS
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a(n) is the unique positive integer less than 10^n such that a(n) is divisible by 5^n and 3*a(n) - 1 is divisible by 2^n. - Eric M. Schmidt, Aug 18 2012
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LINKS
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PROG
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(Sage) [crt(inverse_mod(3, 2^n), 0, 2^n, 5^n) for n in range(1, 1001)] # Eric M. Schmidt, Aug 18 2012
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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