|
|
A093381
|
|
Expansion of (1 - 2*x - 3*x^2 - 4*x^3)/((1-x)*(1-2*x)*(1-3*x)*(1-4*x)).
|
|
2
|
|
|
1, 8, 42, 186, 766, 3058, 12062, 47426, 186606, 735858, 2909182, 11528866, 45781646, 182104658, 725311902, 2891845506, 11539011886, 46070609458, 184025468222, 735329653346, 2938999333326, 11749034250258, 46975237266142
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
Second binomial transform of A093380.
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 4/3 - 5*2^n + 2*3^n + 8*4^n/3;
a(n) = 10*a(n-1) - 35*a(n-2) + 50*a(n-3) - 24*a(n-4), n > 3. - Harvey P. Dale, May 29 2013
|
|
MATHEMATICA
|
CoefficientList[Series[(1-2x-3x^2-4x^3)/((1-x)(1-2x)(1-3x)(1-4x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{10, -35, 50, -24}, {1, 8, 42, 186}, 30] (* Harvey P. Dale, May 29 2013 *)
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|