|
| |
| |
|
|
|
1, 5, 77, 92, 70, 195, 143, 3854, 357, 245, 413, 4088, 2257, 2222, 652, 679, 278949, 3366, 1281, 67963, 1612, 8555, 1518, 63412, 1159158, 2619, 2725, 13862, 60973, 3069, 10790, 3128, 4620, 5083, 42918, 3406
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
COMMENTS
|
6a(n)^2 is divisible by A001032(n). Proof: Let s = A007475(n), n = A001032(n), then a(n)^2 = sum(k=s, s+n-1, k^2) = n/6*(2n^2+(6s-3)n+6s^2-6s+1).
|
|
|
LINKS
|
Table of n, a(n) for n=0..35.
|
|
|
EXAMPLE
|
A001032(3)=11, A007475(3)=18, so 18^2+19^2+...+28^2 (11 terms) = 77^2.
|
|
|
CROSSREFS
|
Cf. A001032, A007475.
Sequence in context: A197063 A144997 A088756 * A202607 A222533 A059856
Adjacent sequences: A076212 A076213 A076214 * A076216 A076217 A076218
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Ralf Stephan, Nov 03 2002
|
|
|
STATUS
|
approved
|
| |
|
|
