|
Search: id:A068793
|
|
|
| A068793 |
|
sum{i*(n^(n-i-1)+n^(n+i-1)) | 1<=i<n}. |
|
+0
2
|
|
| 5, 194, 14619, 1831444, 348288905, 94197694758, 34466324363639, 16416600747716168, 9876543210123456789, 7326247444821284733610, 6569987372181208872192659, 7007407167541356868004228892
(list; graph; listen)
|
|
|
OFFSET
|
2,1
|
|
|
COMMENT
|
a(n)=A062813(n)*n^(n-1)+A023811(n).
a(n) is a palindrome in base n representation for all n.
|
|
FORMULA
|
a(n)=(n^n*(n^n*(n-2)+2)-n^2+n-1)/(n-1)^2
|
|
EXAMPLE
|
a(2) = 5 = (101)BIN;
a(8) = 34466324363639 = (765432101234567)OCT;
a(10) = 9876543210123456789;
a(16) = 21173125052858393282329502187520773615 = (FEDC...876543210123456789ABCDEF)HEX.
|
|
CROSSREFS
|
Cf. A068792.
Sequence in context: A086124 A100760 A093154 this_sequence A142927 A114351 A080927
Adjacent sequences: A068790 A068791 A068792 this_sequence A068794 A068795 A068796
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 04 2002
|
|
|
Search completed in 0.002 seconds
|
