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A213063
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Balanced numbers (of order one): k-almost primes that are the average of three successive k-almost primes.
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1
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5, 34, 53, 68, 86, 94, 102, 122, 142, 157, 171, 173, 185, 188, 194, 202, 204, 211, 214, 218, 245, 257, 258, 262, 263, 285, 289, 302, 314, 321, 338, 342, 358, 366, 371, 373, 394, 404, 407, 413, 415, 422, 429, 435, 446, 471, 489, 490, 493, 497, 507, 513, 517, 524, 535, 562
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OFFSET
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1,1
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COMMENTS
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Balanced numbers of order one: defined by the union of balanced primes A006562, balanced semiprimes A213025, balanced 3-almost primes (68, 102, 171, 188, 245, 258, 285, 338, 366, 404, 429, 435, 507, 524,..), balanced 4-almost primes (204, 342, 490, 513,..),.., balanced k-almost primes - all of order one.
Balanced numbers of order two are 79, 119, 148, 205, 218, 281, 299, 302, 339, 349, 410, 439, 493,.., defined by the union of balanced primes of order two of A082077, balanced semiprimes of order two (119, 205, 218, 299, 302, 339, 493,..), balanced 3-almost primes of order two (148, 410, 604, 609, 642..),.., balanced k-almost primes of order two.
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LINKS
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Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
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PROG
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(PARI) list(lim)={
lim=lim\1+.5;
my(v=List(), L=log(lim)\log(2), left=vector(L), middle=vector(L), t);
for(n=3, 2*lim,
t=bigomega(n);
if(t>L, next);
if(middle[t],
if(2*middle[t] == left[t] + n,
if(middle[t] < lim,
listput(v, middle[t])
,
if(vecmin(middle) > lim, return(vecsort(Vec(v))))
)
);
left[t]=middle[t];
middle[t]=n
,
if(left[t], middle[t]=n, left[t]=n)
)
)
}; \\ Charles R Greathouse IV, Jun 14 2012
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CROSSREFS
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Cf. A001222, A006562, A014612, A014613, A014614, A046306, A046308, A213025.
Sequence in context: A145505 A193325 A124936 * A223137 A068560 A039773
Adjacent sequences: A213060 A213061 A213062 * A213064 A213065 A213066
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KEYWORD
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nonn,changed
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AUTHOR
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Gerasimov Sergey, Jun 03 2012
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STATUS
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approved
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