A254106 Inverse permutation to A254105.

1, 2, 3, 6, 4, 5, 10, 15, 9, 21, 28, 7, 8, 14, 36, 45, 20, 55, 66, 13, 27, 78, 91, 35, 105, 120, 11, 12, 19, 44, 136, 153, 54, 171, 190, 26, 65, 210, 231, 77, 253, 276, 18, 34, 90, 300, 325, 104, 351, 378, 43, 119, 406, 435, 135, 465, 496, 16, 17, 25, 53, 152, 528, 561, 170, 595, 630, 64, 189, 666, 703, 209, 741, 780, 33, 76

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..8192

Index entries for sequences that are permutations of the natural numbers

Prog

(Scheme) (define (A254106 n) (let ((col (A254112 n)) (row (A254111 n))) (* (/ 1 2) (- (expt (+ col row) 2) col row row row -2))))

Crossrefs

Inverse: A254105.

Cf. A254108, A254111, A254112.

Sequence in context: A358026 A331117 A282841 * A373323 A072637 A138153

Adjacent sequences: A254103 A254104 A254105 * A254107 A254108 A254109

Keyword

nonn

Author

Antti Karttunen, Jan 27 2015

Status

approved