A031057 Write 2n-1 in base 8 and juxtapose.

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

Offset

1,2

Links

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

Mathematica

Table[IntegerDigits[2n-1, 8], {n, 50}]//Flatten (* Harvey P. Dale, Feb 13 2023 *)

Crossrefs

Sequence in context: A084712 A371144 A031100 * A133069 A192327 A266295

Adjacent sequences: A031054 A031055 A031056 * A031058 A031059 A031060

Keyword

nonn,base

Author

Clark Kimberling

Status

approved