A081998 - OEIS

%I #10 Aug 31 2018 16:49:22

%S 1,2,3,4,5,7,9,11,13,17,19,21,23,26,29,31,37,41,43,47,49,53,59,60,61,

%T 63,67,71,73,79,83,88,89,97,101,103,107,109,113,115,127,131,137,139,

%U 143,149,151,155,157,161,163,167,169,173,179,181,187,191,193,197,198,199

%N Square array read by antidiagonals, alternating upwards and downwards: T(i, j) is the least number that is greater than the previous term and coprime to every number on the same row or column.

%C Is the sequence related to A067126? This should exhibit some number-theoretic properties.

%H Charlie Neder, <a href="/A081998/b081998.txt">Table of n, a(n) for n = 0..10010</a>

%e Array begins:

%e    1,  2,  7,  9, ...

%e    3,  5, 11, ...

%e    4, 13, ...

%e   17, ...

%e   ...

%Y Cf. A081999, A082000, A082001.

%K nonn,tabl

%O 0,2

%A _Amarnath Murthy_, Apr 05 2003

%E More terms from _David Wasserman_, Jul 28 2004