<html>Seqfans,<BR> It would be interesting if sequence A006066 is actually equal to A084935, <BR>which coincides with offset, and includes 65 in the correct offset position. <BR> <BR>Merely Coincidence? <BR>Paul<BR>--------------------------------------------<BR>ID Number: A084935<BR>URL: <A href="http://www.research.att.com/projects/OEIS?Anum=A084935" target=_blank><FONT color=#0066cc>http://www.research.att.com/projects/OEIS?Anum=A084935</FONT></A><BR>Sequence: 0,1,2,5,7,11,15,21,25,32,39,48,54,65,73,86,94,109,119,134,<BR> 145,164,176,194,208,228,243,265,282,305,321,348,366,392,411,<BR> 440,460,491,513,545,566,599,624,660,683,721,747,785,812,852,<BR> 881,921,950,995,1025,1070,1101<BR>Name: Diagonal sums of the array T in A084933.<BR>Example: The northwest corner of T includes<BR> 0 1 1 2<BR> 0 1 2<BR> 0 1<BR> 0,<BR> from which the first four diagonals sums are 0,1,2,5.<BR><BR><BR>-- Ed Pegg Jr <edp@wolfram.com> wrote:<BR>http://mathworld.wolfram.com/KobonTriangle.html<BR><BR>http://www.research.att.com/projects/OEIS?Anum=A006066<BR><BR>n=15 was recently solved, but n=10 to n=14 are still unsolved.<BR><BR>Ed Pegg Jr.<BR><BR>David Wilson wrote:<BR>> See problem 3 of<BR>><BR>> http://www.stetson.edu/~efriedma/papers/planar.ppt<BR>><BR>> for a sequence. I did not find it in the OEIS, maybe the OEIS has a <BR>> corrected version?<BR>><BR>> --------------------------------<BR>> - David Wilson <BR></html>