A096680 A card-arranging problem: values of n such that there exists more than one permutation p_1, ..., p_n of 1, ..., n such that i + p_i is a cube for every i.

112, 115, 116, 117, 119, 124, 125, 126, 127, 128, 129, 130, 133, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212

Offset

1,1

Links

Table of n, a(n) for n=1..51.

Example

117 is in the sequence with permutations
(7,6,...,2,1,117,116,...,9,8) and
(26,25,...,2,1,98,97,...28,27,117,116,...,100,99)

Crossrefs

Cf. A006063, A073364, A095986, A097082, A097083.

Sequence in context: A361341 A300006 A262521 * A109383 A281926 A036301

Adjacent sequences: A096677 A096678 A096679 * A096681 A096682 A096683

Keyword

nonn

Author

Ray Chandler, Jul 25 2004

Status

approved