A254047 Inverse permutation to A191450.

1, 2, 3, 6, 4, 10, 15, 5, 21, 28, 9, 36, 45, 7, 55, 66, 14, 78, 91, 20, 105, 120, 8, 136, 153, 27, 171, 190, 35, 210, 231, 13, 253, 276, 44, 300, 325, 54, 351, 378, 11, 406, 435, 65, 465, 496, 77, 528, 561, 19, 595, 630, 90, 666, 703, 104, 741, 780, 26, 820, 861, 119, 903, 946, 135, 990, 1035, 12, 1081, 1128, 152, 1176, 1225, 170, 1275, 1326, 34

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Index entries for sequences that are permutations of the natural numbers

Prog

(Scheme)
(define (A254047 n) (let ((x (A253887 n)) (y (A254046 n))) (* (/ 1 2) (- (expt (+ x y) 2) x y y y -2))))

Crossrefs

Cf. A191450, A253887, A254046, A254052.

Sequence in context: A368275 A289272 A073318 * A049449 A351378 A104663

Adjacent sequences: A254044 A254045 A254046 * A254048 A254049 A254050

Keyword

nonn

Author

Antti Karttunen, Jan 24 2015

Status

approved