|
|
|
|
1, 2, 8, 12, 40, 24, 108, 88, 168, 128, 420, 184, 696, 384, 576, 640, 1536, 612, 2160, 1024, 1680, 1500, 3784, 1440, 4000, 2544, 4140, 2904, 7560, 2224, 9240, 5184, 6880, 5760, 9216, 4752, 15552, 8100, 11376, 7840, 21200, 6504, 24528, 12080, 15072, 14300
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
FORMULA
|
|
|
EXAMPLE
|
a(5) = 40 = sum of row 5 terms of triangle A143230: (4 + 4 + 8 + 8 + 16).
|
|
MAPLE
|
with(numtheory):
a := proc(n) return phi(n)*add(phi(k), k=1..n): end:
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|