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A115306 a(n) = if n<6 then n else 6*a(floor(n/6)) + 5 - n mod 6. 9
1, 2, 3, 4, 5, 11, 10, 9, 8, 7, 6, 17, 16, 15, 14, 13, 12, 23, 22, 21, 20, 19, 18, 29, 28, 27, 26, 25, 24, 35, 34, 33, 32, 31, 30, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 107 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Self-inverse permutation of the natural numbers;

A115310(n+4,5) = a(n);

if n is written in base 6 representation, then a(n) is the value after replacing all digits d (but not the leading one) by 5-d.

LINKS

Table of n, a(n) for n=1..72.

Index entries for sequences that are permutations of the natural numbers

CROSSREFS

Cf. A054429, A115303, A115304, A115305, A115307, A115308, A115309, A106649.

Sequence in context: A325651 A160000 A245448 * A171592 A265567 A265551

Adjacent sequences:  A115303 A115304 A115305 * A115307 A115308 A115309

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Jan 20 2006

STATUS

approved

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Last modified September 17 11:15 EDT 2019. Contains 327129 sequences. (Running on oeis4.)