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 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 Table of n, a(n) for n=1..4. 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 Adjacent sequences: A356081 A356082 A356083 * A356085 A356086 A356087 KEYWORD nonn,more AUTHOR Kevin Ryde, Jul 27 2022 STATUS approved

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