A210111 Left half of triangle A125053.

1, 1, 3, 5, 15, 21, 61, 183, 285, 327, 1385, 4155, 6681, 8475, 9129, 50521, 151563, 247065, 325947, 378105, 396363, 2702765, 8108295, 13311741, 17908935, 21517869, 23823015, 24615741, 199360981, 598082943, 985993845, 1341471567, 1643702325, 1874297343

Offset: 0

Author

Reinhard Zumkeller, Mar 17 2012

Keywords

• nonn
• tabl

Links

• Reinhard Zumkeller, Rows n=0..120 of triangle, flattened

Crossrefs

Cf. A000364 (left edge), A125054 (right edge); A210108.

Programs

Haskell

a210111 n k = a210111_tabl !! n !! k
a210111_row n = a210111_tabl !! n
a210111_tabl = zipWith take [1..] a125053_tabf

Formula

T(n,k) = A125053(n,k), 0 <= k <= n.