This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A059229 A diagonal of triangle defined in A059226. 2

%I

%S 0,2,12,70,426,2708,17846,121014,839388,5929162,42509318,308561388,

%T 2263197114,16748071210,124893822012,937612685502,7080464093282,

%U 53748285892004,409909445733950,3139241855256334,24132284421690988

%N A diagonal of triangle defined in A059226.

%H G. C. Greubel, <a href="/A059229/b059229.txt">Table of n, a(n) for n = 1..250</a>

%H <a href="/index/Bo#boustrophedon">Index entries for sequences related to boustrophedon transform</a>

%t T[i_, j_]:= T[i, j] = Module[{r, s, t1}, If[i == 0 && j == 0, Return[1]]; If[j == 0, Return[0]]; t1 = T[i, j - 1]; For[r = 0, r <= i - j, r++,

%t For[s = 0, s <= j, s++, If[r + s != i, t1 = t1 + T[r + s, s]]]]; Return[t1]]; Table[T[n, n - 1], {n, 1, 25}] (* _G. C. Greubel_, Jan 03 2017 *)

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Jan 19 2001

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 20 21:49 EDT 2019. Contains 321352 sequences. (Running on oeis4.)