A276956 Inverse permutation to A276955.

1, 2, 3, 6, 10, 4, 15, 5, 21, 28, 36, 9, 45, 14, 55, 66, 78, 91, 105, 120, 136, 153, 171, 7, 190, 20, 210, 231, 253, 8, 276, 27, 300, 325, 351, 35, 378, 44, 406, 435, 465, 496, 528, 561, 595, 630, 666, 13, 703, 54, 741, 780, 820, 19, 861, 65, 903, 946, 990, 77, 1035, 90, 1081, 1128, 1176, 1225, 1275, 1326, 1378, 1431, 1485, 104

Offset

1,2

Links

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

Index entries for sequences related to factorial base representation

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 = A276949(n), and r = A276951(n).

As a composition of other permutations:

a(n) = A257506(A275847(n)).

Prog

(Scheme) (define (A276956 n) (let ((row (A276951 n)) (col (A276949 n))) (* (/ 1 2) (- (expt (+ row col) 2) row col col col -2))))

Crossrefs

Inverse: A276955.

Cf. A276949, A276951.

Related permutations: A257506, A275847.

Sequence in context: A353122 A058911 A249247 * A276946 A191542 A191668

Adjacent sequences: A276953 A276954 A276955 * A276957 A276958 A276959

Keyword

nonn,base

Author

Antti Karttunen, Sep 22 2016

Status

approved