id:A115305 - OEIS Search Results

Search: id:A115305

Displaying 1-1 of 1 results found.

page 1

a(n) = if n<5 then n else 5*a(floor(n/5)) + 4 - n mod 5.

+0
10

1, 2, 3, 4, 9, 8, 7, 6, 5, 14, 13, 12, 11, 10, 19, 18, 17, 16, 15, 24, 23, 22, 21, 20, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Self-inverse permutation of the natural numbers;` `A115310(n+3,4) = a(n);` `if n is written in base 5 representation, then a(n) is the value after replacing all digits d (but not the leading one) by 4-d.`
	LINKS	`Index entries for sequences that are permutations of the natural numbers`
	CROSSREFS	`Cf. A054429, A115303, A115304, A115306, A115307, A115308, A115309, A106649.` `Sequence in context: A060866 A064478 A111798 this_sequence A098550 A098293 A095260` `Adjacent sequences: A115302 A115303 A115304 this_sequence A115306 A115307 A115308`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 20 2006`

page 1

Search completed in 0.002 seconds

Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

AT&T Labs Research