|
| |
|
|
A123201
|
|
Numbers n such that n..n+7 are products of the same number of primes.
|
|
0
| |
|
|
3405122, 3405123, 6612470, 8360103, 8520321, 9306710, 10762407, 12788342, 12788343, 15212151, 15531110, 16890901, 17521382, 17521383, 21991382, 21991383, 22715270, 22715271, 22841702, 22841703, 22914722, 22914723
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| Note that because 3405130=2*5*167*2039 is also 4-almost prime, 3405122 is the first n such that numbers n..n+8 are products of the same number N of primes (N=4).
|
|
|
EXAMPLE
| 3405122=2*7*29*8387, 3405123=3^2*19*19913, 3405124=2^2*127*6703, 3405125=5^3*27241, 3405126=2*3*59*9619, 3405127=11*23*43*313, 3405128=2^3*425641, 3405129=3*7*13*12473 all 4-almost primes.
|
|
|
CROSSREFS
| Sequence in context: A206382 A114682 A157106 * A082247 A036473 A154871
Adjacent sequences: A123198 A123199 A123200 * A123202 A123203 A123204
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Nov 05 2006
|
|
|
EXTENSIONS
| a(7)-a(22) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 09 2010
|
| |
|
|
