A275898 Read the infinite chessboard underlying A065188 by successive antidiagonals and record when the queens are encountered. Here the rows and columns are indexed starting at 1 (as in A065188).

1, 8, 14, 24, 33, 97, 115, 143, 164, 184, 198, 262, 291, 447, 485, 582, 609, 796, 846, 920, 973, 1019, 1053, 1195, 1256, 1465, 1562, 1734, 1808, 1915, 1993, 2105, 2321, 2388, 2584, 2956, 3052, 3290, 3353, 3603, 3709, 3972, 4040, 4314, 4430, 4523, 4597, 5089, 5317, 5606, 5845, 6174, 6372

Offset

1,2

Links

Alois P. Heinz, Table of n, a(n) for n = 1..10000

Example

The second queen appears in the fourth antidiagonal at position 8 (calling the top left square square 1):
Qxxx
xxxQ
xQxx
xxxx
so a(2) = 8.

Crossrefs

Cf. A065188, A275895, A275897.

Sequence in context: A218145 A250098 A155156 * A248427 A090993 A211525

Adjacent sequences: A275895 A275896 A275897 * A275899 A275900 A275901

Keyword

nonn

Author

N. J. A. Sloane, Aug 23 2016, following a suggestion from David A. Corneth

Status

approved