login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A356084 Matula-Goebel number of the complete quaternary (4-ary) tree of n levels. 2
1, 16, 7890481, 379723559137648771815613388050801 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = prime(a(n-1))^4, for n>=2.
EXAMPLE
For n=3, the complete quaternary tree of 3 levels is
7890481
/ / \ \ a(4) = prime(16)^4
16 16 16 16 = 7890481
// \\ // \\ // \\ // \\
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
PROG
(PARI) a(n) = my(ret=1); for(i=2, n, ret=prime(ret)^4); ret;
CROSSREFS
Cf. A007097, A356082 (binary), A356083 (ternary).
Sequence in context: A116102 A323336 A372140 * A369821 A013878 A058418
KEYWORD
nonn,more
AUTHOR
Kevin Ryde, Jul 27 2022
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 25 00:10 EDT 2024. Contains 374585 sequences. (Running on oeis4.)