A031100 Write 2n-1 in base 9 and juxtapose.

1, 3, 5, 7, 1, 0, 1, 2, 1, 4, 1, 6, 1, 8, 2, 1, 2, 3, 2, 5, 2, 7, 3, 0, 3, 2, 3, 4, 3, 6, 3, 8, 4, 1, 4, 3, 4, 5, 4, 7, 5, 0, 5, 2, 5, 4, 5, 6, 5, 8, 6, 1, 6, 3, 6, 5, 6, 7, 7, 0, 7, 2, 7, 4, 7, 6, 7, 8, 8, 1, 8, 3, 8, 5, 8, 7, 1, 0, 0, 1, 0, 2, 1, 0, 4, 1, 0, 6, 1, 0

Offset

1,2

Links

Table of n, a(n) for n=1..90.

Mathematica

Table[IntegerDigits[2n-1, 9], {n, 50}]//Flatten (* Harvey P. Dale, Jul 22 2019 *)

Crossrefs

Sequence in context: A324990 A084712 A371144 * A031057 A133069 A192327

Adjacent sequences: A031097 A031098 A031099 * A031101 A031102 A031103

Keyword

nonn,base

Author

Clark Kimberling

Status

approved