|
|
A246987
|
|
Expansion of (1-11*x+34*x^2-21*x^3+2*x^4)/((1-x)*(1-2*x)*(1-4*x)*(1-5*x)*(1-6*x)).
|
|
1
|
|
|
1, 7, 39, 206, 1087, 5832, 31949, 178486, 1013667, 5832452, 33896809, 198496866, 1168995647, 6913808272, 41021119269, 243974552846, 1453712656027, 8674107635292, 51813825111329, 309768931954426, 1853203840458807, 11092815661905512, 66427422581744989, 397927440625389606, 2384420217810707987
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
FORMULA
|
a(n) = (1 - 3*2^(2+n) + 7*2^(1+2*n) + 3*5^n + 6^(1+n)) / 12. - Colin Barker, Jun 06 2015
|
|
PROG
|
(PARI) Vec((2*x^4-21*x^3+34*x^2-11*x+1)/(-240*x^5+508*x^4-372*x^3+121*x^2-18*x+1) + O(x^40)) \\ Colin Barker, Jun 06 2015
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|