A055951 n - reversal of base 5 digits of n (written in base 10).

0, 0, 0, 0, 0, 4, 0, -4, -8, -12, 8, 4, 0, -4, -8, 12, 8, 4, 0, -4, 16, 12, 8, 4, 0, 24, 0, -24, -48, -72, 24, 0, -24, -48, -72, 24, 0, -24, -48, -72, 24, 0, -24, -48, -72, 24, 0, -24, -48, -72, 48, 24, 0, -24, -48, 48, 24, 0, -24, -48, 48, 24, 0, -24, -48, 48, 24, 0, -24, -48, 48, 24, 0, -24, -48, 72, 48, 24, 0, -24, 72, 48, 24, 0

Offset: 0

Author

Henry Bottomley, Jul 18 2000

Keywords

• base
• sign

Comments

a(n) is a multiple of 4.

Links

• Paolo Xausa, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A030104, A056965.

Programs

Mathematica

Table[n - IntegerReverse[n, 5], {n, 0, 100}] (* Paolo Xausa, Aug 08 2024 *)

Formula

a(n) = n - A030104(n).