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A055947 n - reversal of base 3 digits of n (written in base 10). 2
0, 0, 0, 2, 0, -2, 4, 2, 0, 8, 0, -8, 8, 0, -8, 8, 0, -8, 16, 8, 0, 16, 8, 0, 16, 8, 0, 26, 0, -26, 20, -6, -32, 14, -12, -38, 32, 6, -20, 26, 0, -26, 20, -6, -32, 38, 12, -14, 32, 6, -20, 26, 0, -26, 52, 26, 0, 46, 20, -6, 40, 14, -12, 58, 32, 6, 52, 26, 0, 46, 20, -6, 64, 38, 12, 58, 32, 6, 52, 26, 0, 80, 0, -80, 56, -24, -104, 32, -48 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

a(n) is even.

LINKS

Indranil Ghosh, Table of n, a(n) for n = 0..20000

FORMULA

a(n) = n - A030102(n).

EXAMPLE

For n = 5, the reversal of base 3 digits of n (written in base 10) is 7. So, a(5) = 5 - 7 = -2. - Indranil Ghosh, Feb 01 2017

PROG

(PARI) a(n) = n - fromdigits(Vecrev(digits(n, 3)), 3); \\ Michel Marcus, Aug 09 2019

CROSSREFS

Cf. A030102, A056965.

Sequence in context: A092741 A144182 A037036 * A015910 A182256 A164993

Adjacent sequences:  A055944 A055945 A055946 * A055948 A055949 A055950

KEYWORD

base,sign

AUTHOR

Henry Bottomley, Jul 18 2000

STATUS

approved

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Last modified December 10 04:04 EST 2019. Contains 329885 sequences. (Running on oeis4.)