A025683 Exponent of 9 (value of i) in n-th number of form 9^i*10^j.

0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 6, 5, 4, 3, 2, 1, 0, 7, 6, 5, 4, 3, 2, 1, 0, 8, 7, 6, 5, 4, 3, 2, 1, 0, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3

Offset

1,4

Links

Table of n, a(n) for n=1..102.

Mathematica

Table[Range[n, 0, -1], {n, 0, 15}]//Flatten (* Harvey P. Dale, Jan 20 2022 *)

Crossrefs

Differs from A025581 at a(253).

Sequence in context: A025581 A025669 A025676 * A025660 A025677 A025651

Adjacent sequences: A025680 A025681 A025682 * A025684 A025685 A025686

Keyword

nonn

Author

David W. Wilson

Status

approved