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 A217709 Numbers of the form p^q^r, for p,q,r primes. 0
 16, 81, 256, 512, 625, 2401, 6561, 14641, 19683, 28561, 83521, 130321, 279841, 390625, 707281, 923521, 1874161, 1953125, 2825761, 3418801, 4879681, 5764801, 7890481, 12117361, 13845841, 20151121, 25411681, 28398241, 33554432, 38950081, 40353607, 47458321 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Subset of A217261. Sequence suggested by Kevin L. Schwartz in a Facebook discussion. LINKS EXAMPLE a(1) = 2^2^2 = 16; a(2) = 3^2^2 = 81; a(3) = 2^2^3 = 256; a(4) = 2^3^2 = 512; a(5) = 5^2^2 = 625. CROSSREFS Cf. A000040, A000961, A217261. Sequence in context: A250362 A217261 A277562 * A257854 A017672 A055013 Adjacent sequences:  A217706 A217707 A217708 * A217710 A217711 A217712 KEYWORD nonn,easy AUTHOR Jonathan Vos Post, Mar 20 2013 EXTENSIONS More terms from Alois P. Heinz, Mar 20 2013 STATUS approved

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Last modified September 15 16:33 EDT 2019. Contains 327078 sequences. (Running on oeis4.)