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

0,3

Links

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

Formula

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

Prog

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

Crossrefs

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

Sequence in context: A128396 A155173 A202505 * A121219 A113732 A329852

Adjacent sequences: A210108 A210109 A210110 * A210112 A210113 A210114

Keyword

nonn,tabl

Author

Reinhard Zumkeller, Mar 17 2012

Status

approved