|
Search: id:A073617
|
|
|
| A073617 |
|
Consider Pascal's triangle A007318; a(n) = product of terms at +45 degrees slope with the horizontal. |
|
+0
3
|
|
| 1, 1, 1, 2, 3, 12, 30, 240, 1050, 16800, 132300, 4233600, 61122600, 3911846400, 104886381600, 13425456844800, 674943865596000, 172785629592576000, 16407885372638760000, 8400837310791045120000, 1515727634953623371280000
(list; graph; listen)
|
|
|
OFFSET
|
0,4
|
|
|
COMMENT
|
The sum of the terms pertaining to the above product is the n-th Fibonacci number: 1 + 5 + 6 + 1 = 13.
|
|
EXAMPLE
|
The seventh diagonal is 1,5,6,1 and product of the terms = 30 hecne a(6) = 30.
|
|
CROSSREFS
|
Cf. A073618.
Cf. A007685.
Adjacent sequences: A073614 A073615 A073616 this_sequence A073618 A073619 A073620
Sequence in context: A025560 A109489 A105401 this_sequence A034381 A076424 A072440
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 07 2002
|
|
EXTENSIONS
|
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 22 2003
|
|
|
Search completed in 0.002 seconds
|
