A178800 - OEIS

A178800

Smaller of two consecutive numbers with prime signature {1,2,3}.

41624, 177624, 336500, 515096, 625975, 686375, 767124, 789399, 816776, 829575, 985959, 1035800, 1059624, 1173500, 1184183, 1276856, 1340199, 1365875, 1369575, 1614500, 1784871, 1790199, 1890567, 2078199, 2175875, 2219624, 2364200, 2379351, 2540600

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OFFSET

1,1

COMMENTS

The numbers in this sequence are described by both A052213 (consecutive numbers with the same prime signature) and A163569 (numbers with prime signature {1,2,3}).

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..1000

PROG

(PARI) e=vector(3); for(n=360, 2540600, if(omega(n)==3, if(bigomega(n)==6, if(omega(n+1)==3, if(bigomega(n+1)==6, for(m=n, n+1, f=factorint(m); for(j=1, 3, e[j]=f[j, 2]); e=vecsort(e); for(j=1, 3, if(e[j]<>j, next(3)))); print1(n ", ")))))) \\ Donovan Johnson, Dec 17 2013

CROSSREFS

Cf. A163569, A052213.

Sequence in context: A163392 A262801 A253681 * A031669 A028239 A248445

Adjacent sequences: A178797 A178798 A178799 * A178801 A178802 A178803

KEYWORD

nonn

AUTHOR

Will Nicholes, Jun 15 2010

EXTENSIONS

Extended by Ray Chandler, Jul 30 2010

STATUS

approved