|
| |
|
|
A111686
|
|
(n+1) + (n+1)(n+2) + ..., with n terms.
|
|
1
| |
|
|
2, 15, 144, 1925, 33648, 726327, 18636560, 553680369, 18684924840, 705833193923, 29502690532392, 1351724235304365, 67359683340291104, 3627011494019437935, 209846445862386234528, 12982402818188717219657, 855210841645834409812920
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
LINKS
| Eric Weisstein's World of Mathematics, Rising Factorial.
|
|
|
EXAMPLE
| a(3) = 4+ 4*5 +4*5*6 = 144.
|
|
|
MAPLE
| a:=n->sum((n+j)!, j=1..n)/n!: seq(a(n), n=1..18); # (Deutsch)
|
|
|
CROSSREFS
| Cf. A111685, A054654.
Sequence in context: A140306 A143924 A005415 * A001854 A060226 A002103
Adjacent sequences: A111683 A111684 A111685 * A111687 A111688 A111689
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 16 2005
|
|
|
EXTENSIONS
| a(6)-a(10) from Jonathan Vos Post (jvospost3(AT)gmail.com) Aug 17 2005
More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 27 2005
|
| |
|
|
