A186023 Eigentriangle of triangle A085478.

1, 1, 1, 2, 1, 1, 6, 4, 1, 1, 23, 15, 6, 1, 1, 106, 68, 28, 8, 1, 1, 567, 365, 145, 45, 10, 1, 1, 3434, 2215, 877, 262, 66, 12, 1, 1, 23137, 14917, 5936, 1750, 427, 91, 14, 1, 1, 171174, 110324, 43936, 13020, 3108, 648, 120, 16, 1, 1, 1376525, 887232, 353067, 104904, 25125, 5091, 933, 153, 18, 1, 1

Offset: 0

Author

Paul Barry, Feb 10 2011

Keywords

• nonn
• tabl

Comments

First column is A125273. Inverse of A186024. Rows sums are A125273(n)*(2-0^n).

Examples

			Triangle begins
       1;
       1,      1;
       2,      1,     1;
       6,      4,     1,     1;
      23,     15,     6,     1,    1;
     106,     68,    28,     8,    1,   1;
     567,    365,   145,    45,   10,   1,   1;
    3434,   2215,   877,   262,   66,  12,   1,  1;
   23137,  14917,  5936,  1750,  427,  91,  14,  1, 1;
  171174, 110324, 43936, 13020, 3108, 648, 120, 16, 1, 1;
		

Links

• Paul Barry, Invariant number triangles, eigentriangles and Somos-4 sequences, arXiv preprint arXiv:1107.5490 [math.CO], 2011.

Crossrefs

Cf. A125273, A186020, A186024,