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 A030986 3-automorphic numbers ending in 5: final digits of 3*n^2 agree with n. 1
 5, 75, 875, 6875, 96875, 296875, 4296875, 4296875, 404296875, 9404296875, 39404296875, 639404296875, 6639404296875, 86639404296875, 86639404296875, 2086639404296875, 52086639404296875 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 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 LINKS Eric M. Schmidt, Table of n, a(n) for n = 1..1000 Eric Weisstein's World of Mathematics, Automorphic Number PROG (Sage) [crt(inverse_mod(3, 2^n), 0, 2^n, 5^n) for n in range(1, 1001)] # Eric M. Schmidt, Aug 18 2012 CROSSREFS Sequence in context: A105490 A307823 A105494 * A284924 A248340 A224088 Adjacent sequences:  A030983 A030984 A030985 * A030987 A030988 A030989 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified August 15 00:08 EDT 2022. Contains 356122 sequences. (Running on oeis4.)