A101162 Row sums of a Chebyshev number triangle.

1, 3, 6, 14, 40, 131, 471, 1829, 7620, 33902, 160362, 803065, 4241457, 23546969, 137002658, 833225728, 5284731576, 34881786097, 239147833907, 1700114999791, 12512735023124, 95205884573428, 747892058653238, 6058264178225451

Offset

0,2

Comments

Row sums of number triangle A101161.

Links

Table of n, a(n) for n=0..23.

Formula

a(n)=sum{k=0..n, if(n=k, 1, 2T(n-k, (k+2)/2))} where T(n, k)=(n/2)sum{j=0..floor(n/2), C(n-j, j)(-1)^j*(2k)^(n-2j)}.

Crossrefs

Cf. A101163.

Sequence in context: A335580 A079003 A099966 * A274054 A059741 A054099

Adjacent sequences: A101159 A101160 A101161 * A101163 A101164 A101165

Keyword

easy,nonn

Author

Paul Barry, Dec 03 2004

Status

approved