1,2

a(9) = 0. For any number with any 0 digits, A096089(n) >= 10. The only number with n digits and no zeros that can be multiplied by 9 to produce a number with the same number of digits is 111...1, so 9 cannot be achieved. A similar argument shows that a(n) = 0 for any n whose leading digit is 9. Note that a(89) = 1011199; probably every number whose leading digit is not 9 does occur in A096089. - Franklin T. Adams-Watters, Jul 19 2006

R. J. Mathar, List of n, a(n) for n=1..1000 with a(n)=-1 for unknown terms.

a(7) = 119 as floor[911/119] = floor[7.655462184...] = 7 and 119 is the smallest such number.

Cf. A096089, A096091.

Sequence in context: A109019 A068893 A079829 * A037286 A166533 A166534

Adjacent sequences: A096087 A096088 A096089 * A096091 A096092 A096093

base,nonn

Amarnath Murthy, Jun 22 2004

1119 from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Jul 19 2004, who remarks that a(9) is not known. The terms after a(9) are 10, 506, 304, 203, 508, 305, 509, 102, 1012, 307, 205, 308, 2035, 103, 1033, 2056, 207, 1013, 2067, 104, 1044, 209, 1034, 1024, 105, 1055, 1014, 1045, 106, 1035, 2029, 107, ...

More terms from Franklin T. Adams-Watters, Jul 19 2006

approved