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A246274 Inverse of A246273 considered as a permutation of natural numbers. 6
1, 2, 3, 4, 6, 7, 10, 5, 15, 11, 21, 16, 28, 9, 36, 22, 45, 29, 55, 20, 66, 37, 78, 8, 91, 14, 105, 46, 120, 56, 136, 35, 153, 13, 171, 67, 190, 77, 210, 79, 231, 92, 253, 27, 276, 106, 300, 12, 325, 104, 351, 121, 378, 26, 406, 170, 435, 137, 465, 154, 496, 65, 528, 43, 561, 172, 595, 209, 630, 191, 666, 211, 703, 54, 741, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10001
Index entries for sequences that are permutations of the natural numbers
FORMULA
a(n) = ((x+y)^2 - x - 3y + 2)/2, where x = A246277(n+1) and y = A055396(n+1).
As a composition of related permutations:
a(n) = A209268(A246675(n)).
PROG
(Scheme) (define (A246274 n) (let ((x (A246277 (+ 1 n))) (y (A055396 (+ 1 n)))) (* (/ 1 2) (- (expt (+ x y) 2) x y y y -2))))
CROSSREFS
Inverse: A246273.
Related permutations: A209268, A246675, A246276.
Cf. A055396, A246277.
Sequence in context: A208281 A306074 A250252 * A057519 A337659 A373041
Adjacent sequences: A246271 A246272 A246273 * A246275 A246276 A246277
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 21 2014
STATUS
approved

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Last modified August 29 09:16 EDT 2024. Contains 375511 sequences. (Running on oeis4.)