|
| |
|
|
A063402
|
|
a(0)=0; a(1)=1; a(2)=2; a(n)= a(n-1) + a(n-2)*a(n-3).
|
|
1
| |
|
|
0, 1, 2, 2, 4, 8, 16, 48, 176, 944, 9392, 175536, 9041584, 1657675696, 1588781164720, 14989602831307184, 2633698912621747952304, 23815201278713350097371300784, 39478100701260806183512640492975852720
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,29
|
|
|
PROG
| (PARI) { for (n = 0, 29, if (n>2, a=a1 + a2*a3; a3=a2; a2=a1; a1=a, if (n==0, a=a3=0; a2=1; a1=2, if (n==1, a=1, a=2))); write("b063402.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 20 2009]
|
|
|
CROSSREFS
| Cf. A006888.
Sequence in context: A123593 A122748 A108774 * A175195 A139800 A168058
Adjacent sequences: A063399 A063400 A063401 * A063403 A063404 A063405
|
|
|
KEYWORD
| nonn,easy
|
|
|
AUTHOR
| Olivier Gerard (olivier.gerard(AT)gmail.com), Jul 16 2001.
|
| |
|
|
