|
Search: id:A062000
|
|
|
| A062000 |
|
a(n)=a(n-1)^2-a(n-2)^2. |
|
+0
2
|
|
| 0, 2, 4, 12, 128, 16240, 263721216, 69548879504781056, 4837046640370554355727482727956480, 23397020201120067002755280700388456275000098577861376610994277515264
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
a(3)=4^2-2^2=12
|
|
LINKS
|
Harry J. Smith, Table of n, a(n) for n=0,...,12
Index entries for sequences of form a(n+1)=a(n)^2 + ...
|
|
FORMULA
|
a(n)=2*A061999(n)
|
|
PROGRAM
|
(PARI) { for (n=0, 12, if (n>1, a=a1^2 - a2^2; a2=a1; a1=a, if (n==0, a=a2=0, a=a1=2)); write("b062000.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 29 2009]
|
|
CROSSREFS
|
Cf. A001042 and A057078 have the same recurrence.
Sequence in context: A001696 A013333 A154882 this_sequence A053040 A154734 A059085
Adjacent sequences: A061997 A061998 A061999 this_sequence A062001 A062002 A062003
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Henry Bottomley (se16(AT)btinternet.com), May 29 2001
|
|
EXTENSIONS
|
First term corrected by Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 29 2009
|
|
|
Search completed in 0.002 seconds
|
