The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A193597 Augmentation of the triangle A193596.  See Comments. 2

%I

%S 1,1,1,1,2,2,1,4,6,5,1,6,17,21,16,1,9,34,78,86,61,1,12,69,201,397,401,

%T 269,1,16,116,522,1282,2250,2113,1350,1,20,194,1074,4099,8900,14187,

%U 12509,7650,1,25,292,2172,10078,34044,67316,99102,82713,48634,1

%N Augmentation of the triangle A193596. See Comments.

%C For an introduction to the unary operation "augmentation" as applied to triangular arrays or sequences of polynomials, see A193091.

%e First 5 rows of A193596:

%e 1

%e 1...1

%e 1...1...1

%e 1...2...2...1

%e 1...2...3...2...1

%t p[n_, k_] := Ceiling[Binomial[n, k]/2]

%t Table[p[n, k], {n, 0, 10}, {k, 0, n}]

%t Flatten[%] (* A193596 *)

%t m[n_] := Table[If[i <= j, p[n + 1 - i, j - i], 0], {i, n}, {j, n + 1}]

%t TableForm[m[4]]

%t w[0, 0] = 1; w[1, 0] = p[1, 0]; w[1, 1] = p[1, 1];

%t v[0] = w[0, 0]; v[1] = {w[1, 0], w[1, 1]};

%t v[n_] := v[n - 1].m[n]

%t TableForm[Table[v[n], {n, 0, 10}]] (* A193597 *)

%t Flatten[Table[v[n], {n, 0, 10}]]

%Y Cf. A193596, A193091.

%K nonn,tabl

%O 0,5

%A _Clark Kimberling_, Jul 31 2011

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 April 18 02:33 EDT 2021. Contains 343072 sequences. (Running on oeis4.)