A140340 Square array read by rows: T(n,k) = 19*n^2+10*k^2-(n-1)*(20*(k-1)+10), with 14 columns.

29, 59, 109, 179, 269, 379, 509, 659, 829, 1019, 1229, 1459, 1709, 1979, 76, 86, 116, 166, 236, 326, 436, 566, 716, 886, 1076, 1286, 1516, 1766, 161, 151, 161, 191, 241, 311, 401, 511, 641, 791, 961, 1151, 1361, 1591, 284, 254, 244, 254, 284, 334, 404, 494, 604, 734, 884, 1054, 1244, 1454

Offset

1,1

Links

Table of n, a(n) for n=1..56.

Example

Array begins:
   29,  59, 109, 179, 269, 379, 509, 659, 829, 1019, 1229, 1459, 1709, 1979;
   76,  86, 116, 166, 236, 326, 436, 566, 716,  886, 1076, 1286, 1516, 1766;
  161, 151, 161, 191, 241, 311, 401, 511, 641,  791,  961, 1151, 1361, 1591;
  284, 254, 244, 254, 284, 334, 404, 494, 604,  734,  884, 1054, 1244, 1454;
  445, 395, 365, 355, 365, 395, 445, 515, 605,  715,  845,  995, 1165, 1355;
...

Maple

T:=(n, k) -> 19*n^2+10*k^2-(n-1)*(20*(k-1)+10);

Crossrefs

Cf. A140754 (a very similar array), A140755.

Sequence in context: A293425 A158477 A161928 * A140754 A047078 A073651

Adjacent sequences: A140337 A140338 A140339 * A140341 A140342 A140343

Keyword

nonn,tabf,less

Author

Aldrich Stevens (aldrichstevens(AT)msn.com), May 29 2008

Extensions

Edited by Omar E. Pol and N. J. A. Sloane, Jan 11 2009

Status

approved