|
Search: id:A066046
|
|
|
| A066046 |
|
a(1) = 1; a(2) = 2; a(3) = 3; a(n + 3) = a(n + 2)*a(n + 1) + a(n + 1)*a(n) + a(n)*a(n + 2). |
|
+0
1
|
|
| 1, 2, 3, 11, 61, 887, 64535, 61233287, 4006061344659, 245562839177678209243, 983754834334464538655453075619011, 241573634114919799405450621896403920334941569392914059
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
MATHEMATICA
|
a[1] = 1; a[2] = 2; a[3] = 3; a[n_] := a[n] = a[n - 1]*a[n - 2] + a[n - 2]*a[n - 3] + a[n - 1]*a[n - 3]; Table[a[n], {n, 1, 13} ]
|
|
PROGRAM
|
(PARI) { for (n = 1, 18, if (n>3, a=a1*a2 + a2*a3 + a3*a1; a3=a2; a2=a1; a1=a, if (n==1, a=a3=1, if (n==2, a=a2=2, a=a1=3))); write("b066046.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 08 2009]
|
|
CROSSREFS
|
Sequence in context: A041441 A110482 A105217 this_sequence A065597 A001052 A155187
Adjacent sequences: A066043 A066044 A066045 this_sequence A066047 A066048 A066049
|
|
KEYWORD
|
nonn,new
|
|
AUTHOR
|
Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 29 2001
|
|
EXTENSIONS
|
More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 31 2001
|
|
|
Search completed in 0.002 seconds
|
