The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A275902 Following the successive antidiagonals in A275895, let the n-th queen appear in square (x(n),y(n)); sequence gives y(n). 7
 0, 2, 1, 4, 3, 8, 5, 10, 7, 6, 12, 14, 9, 18, 11, 13, 21, 24, 15, 26, 17, 16, 28, 30, 19, 20, 34, 36, 22, 38, 23, 40, 25, 27, 44, 47, 29, 31, 50, 52, 32, 33, 55, 57, 35, 37, 59, 62, 39, 65, 41, 42, 69, 43, 71, 73, 45, 75, 46, 77, 49, 48, 81, 83, 51, 85, 53, 88, 54, 56, 91, 58, 95, 97, 60, 99, 61, 101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS See A275901 for x(n). This is a permutation of the nonnegative numbers. This assumes the indexing starts at 0. See A275899, A275900 if the indexing begins at 1. LINKS N. J. A. Sloane, Table of n, a(n) for n = 0..10386 MAPLE See A275899. # Alternative Maple program from N. J. A. Sloane, Oct 03 2016 # To get 10000 terms of A275902 (xx), A275901 (yy), A276783 (ss), -A276325 (dd) M1:=100000; M2:=22000; M3:=10000; xx:=Array(0..M1, 0); yy:=Array(0..M1, 0); ss:=Array(0..M1, 0); dd:=Array(0..M1, 0); xx[0]:=0; yy[0]:=0; ss[0]:=0; dd[0]:=0; for n from 1 to M2 do sw:=-1;    for s from ss[n-1]+1 to M2 do       for i from 0 to s do          x:=s-i; y:=i;          if not member(x, xx, 'p') and             not member(y, yy, 'p') and             not member(x-y, dd, 'p') then sw:=1; break; fi;       od:  # od i if sw=1 then break; fi;    od: # od s   if sw=-1 then lprint("error, n=", n); break; fi; xx[n]:=x; yy[n]:=y; ss[n]:=x+y; dd[n]:=x-y; od: # od n [seq(xx[i], i=0..M3)]: [seq(yy[i], i=0..M3)]: [seq(ss[i], i=0..M3)]: [seq(dd[i], i=0..M3)]: CROSSREFS Cf. A065188, A275895, A275899, A275900, A275901. Sequence in context: A182177 A281878 A106625 * A008347 A112387 A193174 Adjacent sequences:  A275899 A275900 A275901 * A275903 A275904 A275905 KEYWORD nonn AUTHOR N. J. A. Sloane, Aug 24 2016 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 14 21:21 EDT 2021. Contains 342962 sequences. (Running on oeis4.)