login
A166666
Totally multiplicative sequence with a(p) = 8p+1 for prime p.
1
1, 17, 25, 289, 41, 425, 57, 4913, 625, 697, 89, 7225, 105, 969, 1025, 83521, 137, 10625, 153, 11849, 1425, 1513, 185, 122825, 1681, 1785, 15625, 16473, 233, 17425, 249, 1419857, 2225, 2329, 2337, 180625, 297, 2601, 2625, 201433, 329, 24225, 345
OFFSET
1,2
LINKS
FORMULA
Multiplicative with a(p^e) = (8p+1)^e. If n = Product p(k)^e(k) then a(n) = Product (8*p(k)+1)^e(k).
MATHEMATICA
a[1] = 1; a[n_] := (fi = FactorInteger[n]; Times @@ ((8*fi[[All, 1]] + 1)^fi[[All, 2]])); Table[a[n], {n, 1, 100}](* G. C. Greubel, May 22 2016 *)
CROSSREFS
Sequence in context: A355769 A183346 A373317 * A147445 A129910 A259075
KEYWORD
nonn,mult
AUTHOR
Jaroslav Krizek, Oct 18 2009
STATUS
approved