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A101162 Row sums of a Chebyshev number triangle. 2
1, 3, 6, 14, 40, 131, 471, 1829, 7620, 33902, 160362, 803065, 4241457, 23546969, 137002658, 833225728, 5284731576, 34881786097, 239147833907, 1700114999791, 12512735023124, 95205884573428, 747892058653238, 6058264178225451 (list; graph; refs; listen; history; text; internal format)
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: A261436 A079003 A099966 * A274054 A059741 A054099

Adjacent sequences:  A101159 A101160 A101161 * A101163 A101164 A101165

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Dec 03 2004

STATUS

approved

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Last modified March 21 22:19 EDT 2019. Contains 321382 sequences. (Running on oeis4.)