A265348 Inverse permutation to A265347.

1, 2, 3, 4, 10, 5, 6, 7, 15, 9, 55, 8, 28, 44, 66, 11, 91, 20, 36, 13, 21, 14, 210, 12, 45, 35, 105, 19, 406, 27, 190, 22, 435, 230, 703, 26, 253, 299, 78, 18, 1711, 170, 325, 76, 741, 54, 496, 17, 136, 377, 528, 43, 820, 119, 276, 25, 153, 65, 2145, 34, 300, 209, 120, 16, 1596, 77, 231, 64, 1128, 104, 1770, 33, 351, 275, 171, 53, 2775, 90, 378, 24, 861

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..10328

Index entries for sequences that are permutations of the natural numbers

Formula

a(n) = (1/2) * ((c+r)^2 - r - 3*c + 2), where c = A265331(n), and r = A265911(n).

Prog

(Scheme) (define (A265348 n) (let ((row (A265911 n)) (col (A265331 n))) (* (/ 1 2) (- (expt (+ row col) 2) row col col col -2))))

Crossrefs

Inverse: A265347.

Cf. A265331, A265911.

Sequence in context: A082865 A359996 A368222 * A158929 A255479 A256618

Adjacent sequences: A265345 A265346 A265347 * A265349 A265350 A265351

Keyword

nonn

Author

Antti Karttunen, Dec 18 2015

Status

approved