A277883 Inverse permutation to A277882.

1, 2, 3, 4, 5, 6, 7, 11, 8, 9, 16, 10, 22, 29, 12, 37, 17, 13, 46, 14, 56, 67, 23, 15, 79, 92, 30, 106, 38, 18, 121, 137, 47, 24, 154, 19, 172, 191, 57, 20, 211, 232, 68, 254, 80, 31, 277, 21, 301, 326, 93, 352, 107, 39, 379, 407, 122, 48, 436, 25, 466, 497, 138, 529, 155, 58, 562, 32, 596, 631, 173, 26, 667, 704, 192, 742, 212, 69, 781, 27

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

Formula

a(n) = (1/2) * ((c+r)^2 - r - 3*c + 2), where c = A277813(n), and r = A277822(n).

Prog

(Scheme) (define (A277883 n) (let ((col (A277813 n)) (row (A277822 n))) (* (/ 1 2) (- (expt (+ row col) 2) row col col col -2))))

Crossrefs

Inverse: A277882.

Cf. A277813, A277822.

Sequence in context: A306110 A092026 A084749 * A277196 A102453 A265571

Adjacent sequences: A277880 A277881 A277882 * A277884 A277885 A277886

Keyword

nonn

Author

Antti Karttunen, Nov 03 2016

Status

approved