|
|
|
|
0, 4, 28, 148, 700, 3124, 13468, 56788, 235900, 969844, 3958108, 16068628, 64983100, 262058164, 1054609948, 4237571668, 17007682300, 68202916084, 273328224988, 1094862581908, 4384099373500, 17550344631604, 70243219939228, 281098403995348, 1124770188696700
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
Suggested by a discussion on the Sequence Fans Mailing List; the formula is due to Jaume Oliver Lafont.
|
|
LINKS
|
|
|
FORMULA
|
a(n)=4*A005061(n) = 7*a(n-1)-12*a(n-2). G.f.: 4*x/((4*x-1)*(3*x-1)). [From R. J. Mathar, Mar 18 2009]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|