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A030994 9-automorphic numbers ending in 4: final digits of 9*n^2 agree with n. 1
4, 64, 264, 3264, 23264, 123264, 4123264, 54123264, 754123264, 5754123264, 75754123264, 675754123264, 6675754123264, 26675754123264, 526675754123264, 1526675754123264, 71526675754123264 (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 2^n and 9*a(n) - 1 is divisible by 5^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

Index entries for sequences related to automorphic numbers

Index entries for sequences related to final digits of numbers

PROG

(Sage) [crt(0, inverse_mod(9, 5^n), 2^n, 5^n) for n in xrange(1, 1001)] # Eric M. Schmidt, Aug 18 2012

CROSSREFS

Sequence in context: A062271 A110258 A056982 * A141046 A264055 A222557

Adjacent sequences:  A030991 A030992 A030993 * A030995 A030996 A030997

KEYWORD

nonn,base

AUTHOR

Eric W. Weisstein

STATUS

approved

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Last modified October 20 17:39 EDT 2017. Contains 293648 sequences.