A376315 Positive numbers k such that 2*k^k is a cube.
2, 4, 128, 256, 686, 1372, 2000, 4000, 4394, 8192, 8788, 13718, 16384, 21296, 27436, 31250, 42592, 43904, 59582, 62500, 78608, 87808, 101306, 119164, 128000, 157216, 159014, 194672, 202612, 235298, 256000, 281216, 318028, 332750, 389344, 390224, 453962, 470596
Offset: 1
Keywords
Links
- Chai Wah Wu, Table of n, a(n) for n = 1..897
Programs
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Python
from itertools import count, islice from sympy import factorint def A376315_gen(startvalue=2): # generator of terms >= startvalue for k in count(max(startvalue+(startvalue&1),2),2): f = {p:k*e for p,e in factorint(k).items()} f[2] += 1 if not any(v%3 for v in f.values()): yield k A376315_list = list(islice(A376315_gen(),30))
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