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A028275 Elements in 4-Pascal triangle (by row). 14

%I

%S 1,1,1,1,4,1,1,5,5,1,1,6,10,6,1,1,7,16,16,7,1,1,8,23,32,23,8,1,1,9,31,

%T 55,55,31,9,1,1,10,40,86,110,86,40,10,1,1,11,50,126,196,196,126,50,11,

%U 1,1,12,61,176,322,392,322,176,61,12,1,1,13,73,237,498,714,714,498,237

%N Elements in 4-Pascal triangle (by row).

%F Apart from first 3 rows, use the Pascal rule.

%F T(n, k) = C(n, k) + 2C(n-2, k-1). G.f.: (1+2x^2y) / [1-x(1+y)]. - _Ralf Stephan_, Jan 31 2005

%e 1; 1 1; 1 4 1; 1 5 5 1; 1 6 10 6 1; ...

%Y Cf. A028262, A028313.

%K easy,nonn

%O 0,5

%A _Mohammad K. Azarian_

%E More terms from Ben Baugher (s1191623(AT)cedarville.edu)

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)