A055955 a(n) = n - reversal of base 7 digits of n (written in base 10).

0, 0, 0, 0, 0, 0, 0, 6, 0, -6, -12, -18, -24, -30, 12, 6, 0, -6, -12, -18, -24, 18, 12, 6, 0, -6, -12, -18, 24, 18, 12, 6, 0, -6, -12, 30, 24, 18, 12, 6, 0, -6, 36, 30, 24, 18, 12, 6, 0, 48, 0, -48, -96, -144, -192, -240, 48, 0, -48, -96, -144, -192, -240, 48, 0, -48, -96, -144, -192, -240, 48, 0, -48, -96, -144, -192, -240

Offset: 0

Author

Henry Bottomley, Jul 18 2000

Keywords

• base
• sign

Comments

a(n) is a multiple of 6.

Crossrefs

Cf. A030106, A056965.

Programs

Mathematica

Table[n-FromDigits[Reverse[IntegerDigits[n,7]],7],{n,0,80}] (* Harvey P. Dale, Jul 22 2015 *)

Formula

a(n) = n - A030106(n).