A155870 a(1)=1, if a(n-1) has m digits, a(n) has m mod 9 number of "m mod 9" followed by "m mod 9" zeros if a(n) is not equal to some a(x), x<n; otherwise a(n)=prescribed a(n) + n;

1, 10, 2200, 44440000, 8888888800000000, 77777770000000, 5555500000, 18, 2209, 44440010, 8888888800000011, 77777770000012, 5555500013, 24, 2215, 44440016, 8888888800000017, 77777770000018, 5555500019, 30

Offset

1,2

Comments

Prescribed a(n) is defined as, "if a(n-1) has m digits, a(n) has m mod 9 number of "m mod 9" followed by "m mod 9" zeros"

Links

Table of n, a(n) for n=1..20.

Example

a(3)=2200, number with 4 digits, thus a(4)=44440000. Similarly, a(8) was prescribed to be 10. But, since prescribed a(8)=a(2); a(8)=prescribed a(8)+8=18

Crossrefs

Sequence in context: A114776 A249850 A334007 * A369811 A167775 A359148

Adjacent sequences: A155867 A155868 A155869 * A155871 A155872 A155873

Keyword

nonn,base

Author

Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 29 2009

Status

approved