A257504 Inverse permutation to A257503.

1, 2, 4, 3, 7, 11, 16, 22, 29, 37, 46, 5, 56, 67, 79, 8, 92, 6, 106, 121, 137, 12, 154, 172, 191, 211, 232, 254, 277, 301, 326, 352, 379, 407, 436, 466, 497, 529, 562, 596, 631, 667, 704, 742, 781, 821, 862, 17, 904, 947, 991, 23, 1036, 1082, 1129, 1177, 1226, 1276, 1327, 30, 1379, 1432, 1486, 38, 1541, 47, 1597, 1654, 1712, 57, 1771, 9

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..10440

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 = A257681(n), and r = A257679(n).

Prog

(Scheme) (define (A257504 n) (let ((col (A257681 n)) (row (A257679 n))) (* (/ 1 2) (- (expt (+ row col) 2) row col col col -2))))

Crossrefs

Inverse: A257503.

Cf. A257679, A257681.

Sequence in context: A329877 A223625 A166017 * A207625 A238953 A238964

Adjacent sequences: A257501 A257502 A257503 * A257505 A257506 A257507

Keyword

nonn

Author

Antti Karttunen, May 06 2015

Status

approved