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A166672 Totally multiplicative sequence with a(p) = 9p-2 for prime p. 1
1, 16, 25, 256, 43, 400, 61, 4096, 625, 688, 97, 6400, 115, 976, 1075, 65536, 151, 10000, 169, 11008, 1525, 1552, 205, 102400, 1849, 1840, 15625, 15616, 259, 17200, 277, 1048576, 2425, 2416, 2623, 160000, 331, 2704, 2875, 176128, 367, 24400, 385 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
Multiplicative with a(p^e) = (9p-2)^e. If n = Product p(k)^e(k) then a(n) = Product (9*p(k)-2)^e(k).
MATHEMATICA
a[1] = 1; a[n_] := (fi = FactorInteger[n]; Times @@ ((9*fi[[All, 1]] - 2)^fi[[All, 2]])); Table[a[n], {n, 1, 100}] (* G. C. Greubel, May 22 2016 *)
CROSSREFS
Sequence in context: A152152 A260047 A061101 * A167358 A267764 A264588
KEYWORD
nonn,mult
AUTHOR
Jaroslav Krizek, Oct 18 2009
STATUS
approved

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)