A275899 Following the successive antidiagonals in A065188, let the n-th queen appear in square (x(n),y(n)); sequence gives x(n).

1, 2, 4, 3, 5, 6, 10, 7, 11, 13, 8, 9, 15, 12, 20, 21, 14, 16, 26, 17, 27, 29, 18, 19, 31, 34, 22, 23, 38, 24, 40, 25, 43, 42, 28, 30, 49, 50, 32, 33, 54, 56, 35, 36, 59, 58, 37, 39, 64, 41, 67, 69, 44, 71, 45, 46, 75, 47, 77, 48, 78, 80, 51, 52, 85, 53, 86, 55, 90, 91, 57, 95, 60, 61, 99, 62, 101, 63

Offset

1,2

Comments

See A275900 for y(n).

This is a permutation of the natural numbers.

This assumes the indexing starts at 1. See A275901, A275902 if the indexing begins at 0.

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..7500

Maple

# To get the coordinates of queens in order of appearance; b8[] has list of terms of A065188
M:=7500; c1:=[]; c2:=[];
t1:=[seq(n+b8[n], n=1..M)];
t2:=sort(t1);
for n from 1 to M do
i:=t2[n]; member(i, t1, 'j');
c1:=[op(c1), j]; c2:=[op(c2), b8[j]];
od:
c3:=map(x->x-1, c1):
c4:=map(x->x-1, c2):
[seq(c1[n], n=1..80)]; # A275899
[seq(c2[n], n=1..80)]; # A275900
[seq(c3[n], n=1..80)]; @ A275901
[seq(c4[n], n=1..80)]; @ A275902

Crossrefs

Cf. A065188, A275900, A275901, A275902.

Sequence in context: A244732 A338254 A132949 * A304971 A338252 A086434

Adjacent sequences: A275896 A275897 A275898 * A275900 A275901 A275902

Keyword

nonn

Author

N. J. A. Sloane, Aug 24 2016

Status

approved