0,3

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

Index entries for sequences that are permutations of the natural numbers

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

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

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

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

nonn

Antti Karttunen, Jul 29 2009

approved