A180019 Difference of sums of digits of n in decimal and in ternary representation.

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

Offset: 0

Author

Reinhard Zumkeller, Aug 06 2010

Keywords

• base
• sign

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 0..10000
• Index entries for Colombian or self numbers and related sequences

Crossrefs

Cf. A180017, A180018, A007089.

Cf. A007953, A053735, A037315, A011557.

Cf. A000244, A002283, A008591, A024023.

Programs

PARI

a(n) = sumdigits(n) - sumdigits(n, 3); \\ Michel Marcus, Nov 06 2022

Formula

a(n) = A007953(n) - A053735(n);

a(A037315(n)) = 0;

a(A011557(n)) = 1 - A053735(A011557(n));

a(A000244(n)) = A007953(A000244(n)) - 1;

a(A002283(n)) = A008591(n) - A053735(A002283(n));

a(A024023(n)) = A007953(A024023(n)) - 2*n.