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A134610 Composite numbers such that the cube root of the sum of cubes of their prime factors is a prime. 1
14157, 141960, 466560, 1608575, 3097055, 5338710, 6235076, 16017300, 22353408, 24948000, 25073792, 25564544, 27843750, 29761408, 30570408, 31894350, 40837825, 44175248, 46120064, 49867818, 55814400, 56141963, 71214803, 77450890, 92682405 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Numbers included in A134608, but not in A134609. a(1)=14157 is the minimal number with this property.
The prime factors are taken by multiplicity.
LINKS
Hieronymus Fischer, Table of n, a(n) for n = 1..50
EXAMPLE
a(2)=141960 since 141960=2*2*2*3*5*7*13*13 and (3*2^3+3^3+5^3+7^3+2*13^3)^(1/3)=4913^(1/3)=17.
CROSSREFS
Sequence in context: A207289 A249192 A204282 * A104825 A184574 A184566
KEYWORD
nonn
AUTHOR
Hieronymus Fischer, Nov 11 2007
EXTENSIONS
Minor edits and additional terms by the author, Apr 15 2013
STATUS
approved

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Last modified July 15 19:27 EDT 2024. Contains 374334 sequences. (Running on oeis4.)