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A081998 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. 4
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, 63, 67, 71, 73, 79, 83, 88, 89, 97, 101, 103, 107, 109, 113, 115, 127, 131, 137, 139, 143, 149, 151, 155, 157, 161, 163, 167, 169, 173, 179, 181, 187, 191, 193, 197, 198, 199 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

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

LINKS

Charlie Neder, Table of n, a(n) for n = 0..10010

EXAMPLE

Array begins:

   1,  2,  7,  9, ...

   3,  5, 11, ...

   4, 13, ...

  17, ...

  ...

CROSSREFS

Cf. A081999, A082000, A082001.

Sequence in context: A089651 A063487 A253063 * A325266 A284288 A074583

Adjacent sequences:  A081995 A081996 A081997 * A081999 A082000 A082001

KEYWORD

nonn,tabl

AUTHOR

Amarnath Murthy, Apr 05 2003

EXTENSIONS

More terms from David Wasserman, Jul 28 2004

STATUS

approved

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Last modified June 6 11:14 EDT 2020. Contains 334827 sequences. (Running on oeis4.)