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A163329 Inverse permutation of A163328. 7
0, 1, 3, 2, 4, 7, 5, 8, 12, 6, 10, 15, 11, 16, 22, 17, 23, 30, 21, 28, 36, 29, 37, 46, 38, 47, 57, 9, 13, 18, 14, 19, 25, 20, 26, 33, 24, 31, 39, 32, 40, 49, 41, 50, 60, 48, 58, 69, 59, 70, 82, 71, 83, 96, 27, 34, 42, 35, 43, 52, 44, 53, 63, 51, 61, 72, 62, 73, 85, 74, 86, 99 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

A. Karttunen, Table of n, a(n) for n = 0..6560

Index entries for sequences that are permutations of the natural numbers

FORMULA

a(n) = A001477bi(A163325(n),A163326(n)), where A001477bi(x,y) = (((x+y)^2)+x+(3y))/2.

PROG

(Scheme:) (define (A163329 n) (A001477bi (A163325 n) (A163326 n)))

(define (A001477bi x y) (/ (+ (expt (+ x y) 2) x (* 3 y)) 2))

CROSSREFS

Inverse: A163328. a(n) = A163331(A163327(n)). A054239 is an analogous sequence for binary. Cf. A007089.

Sequence in context: A209706 A134571 A054086 * A261147 A212952 A246259

Adjacent sequences:  A163326 A163327 A163328 * A163330 A163331 A163332

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jul 29 2009

STATUS

approved

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Last modified August 13 05:41 EDT 2020. Contains 336442 sequences. (Running on oeis4.)