This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 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

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