A014884 n is equal to the number of 1's in all numbers <= n written in base 9.

1, 102772, 102773, 102774, 102775, 102776, 102777, 102778, 102779, 102780, 142155, 142156, 737002, 737003, 737004, 737005, 737006, 737007, 737008, 737009, 737010, 1594323, 1594324, 1697095, 1697096, 1697097, 1697098

Offset

1,2

Links

Robert Israel, Table of n, a(n) for n = 1..49

Maple

T:= 0: R:= NULL:
for n from 1 to 6*10^6 do
  T:= T + numboccur(1, convert(n, base, 9));
  if T = n then R:= R, n fi
od:
R; # Robert Israel, Dec 01 2020

Crossrefs

Cf. A014778.

Sequence in context: A081463 A321149 A323604 * A015330 A250704 A250941

Adjacent sequences: A014881 A014882 A014883 * A014885 A014886 A014887

Keyword

nonn,base,fini,full

Author

Olivier Gérard

Status

approved