|
Search: id:A048506
|
|
| |
|
| 1, 2, 7, 25, 81, 241, 673, 1793, 4609, 11521, 28161, 67585, 159745, 372737, 860161, 1966081, 4456449, 10027009, 22413313, 49807361, 110100481, 242221057, 530579457, 1157627905, 2516582401, 5452595201
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
FORMULA
|
a(n) = n(n+1)2^(n-2) + 1 = A001788(n) + 1. - Ralf Stephan, Jan 16 2004
|
|
CROSSREFS
|
n-th difference of a(n), a(n-1), ..., a(0) is (1, 4, 9, 16, 25, ...).
Adjacent sequences: A048503 A048504 A048505 this_sequence A048507 A048508 A048509
Sequence in context: A123764 A013204 A013209 this_sequence A030017 A131430 A007484
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Clark Kimberling (ck6(AT)evansville.edu)
|
|
|
Search completed in 0.002 seconds
|
