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A022170 Triangle of Gaussian binomial coefficients [ n,k ] for q = 6. 16

%I #27 May 28 2018 03:46:19

%S 1,1,1,1,7,1,1,43,43,1,1,259,1591,259,1,1,1555,57535,57535,1555,1,1,

%T 9331,2072815,12485095,2072815,9331,1,1,55987,74630671,2698853335,

%U 2698853335,74630671,55987,1,1,335923

%N Triangle of Gaussian binomial coefficients [ n,k ] for q = 6.

%D F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 698.

%H G. C. Greubel, <a href="/A022170/b022170.txt">Rows n=0..50 of triangle, flattened</a>

%H R. Mestrovic, <a href="http://arxiv.org/abs/1409.3820">Lucas' theorem: its generalizations, extensions and applications (1878--2014)</a>, arXiv preprint arXiv:1409.3820 [math.NT], 2014.

%H Kent E. Morrison, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL9/Morrison/morrison37.html">Integer Sequences and Matrices Over Finite Fields</a>, Journal of Integer Sequences, Vol. 9 (2006), Article 06.2.1.

%H <a href="/index/Ga#Gaussian_binomial_coefficients">Index entries for sequences related to Gaussian binomial coefficients</a>

%F T(n,k) = T(n-1,k-1) + q^k * T(n-1,k). - _Peter A. Lawrence_, Jul 13 2017

%e 1 ;

%e 1 1;

%e 1 7 1;

%e 1 43 43 1;

%e 1 259 1591 259 1;

%e 1 1555 57535 57535 1555 1;

%e 1 9331 2072815 12485095 2072815 9331 1;

%e 1 55987 74630671 2698853335 2698853335 74630671 55987 1 ;

%p A027873 := proc(n)

%p mul(6^i-1,i=1..n) ;

%p end procc:

%p A022170 := proc(n,m)

%p A027873(n)/A027873(m)/A027873(n-m) ;

%p end proc: # _R. J. Mathar_, Jul 19 2017

%t p[n_]:= Product[6^i - 1, {i, 1, n}]; t[n_, k_]:= p[n]/(p[k]*p[n-k]); Table[t[n, k], {n, 0, 15}, {k, 0, n}]//Flatten (* _Vincenzo Librandi_, Aug 13 2016 *)

%t Table[QBinomial[n,k,6], {n,0,10}, {k,0,n}]//Flatten (* or *) q:= 6; T[n_, 0]:= 1; T[n_,n_]:= 1; T[n_,k_]:= T[n,k] = If[k < 0 || n < k, 0, T[n-1, k -1] +q^k*T[n-1,k]]; Table[T[n,k], {n,0,10}, {k,0,n}] // Flatten (* _G. C. Greubel_, May 27 2018 *)

%o (PARI) {q=6; T(n,k) = if(k==0,1, if (k==n, 1, if (k<0 || n<k, 0, T(n-1,k-1) + q^k*T(n-1,k))))};

%o for(n=0,10, for(k=0,n, print1(T(n,k), ", "))) \\ _G. C. Greubel_, May 27 2018

%Y Cf. A003463 (k=1), A022220 (k=2), A022221 (k=3).

%K nonn,tabl

%O 0,5

%A _N. J. A. Sloane_

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Last modified March 29 10:44 EDT 2024. Contains 371268 sequences. (Running on oeis4.)