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 7a(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
PROG
(Sage) [crt(0, inverse_mod(7, 5^n), 2^n, 5^n) for n in range(1, 1001)] # Eric M. Schmidt, Aug 18 2012
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved