This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A178800 Smaller of two consecutive numbers with prime signature {1,2,3}. 1
 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 (list; graph; refs; listen; history; text; internal format)
 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 26 00:10 EDT 2017. Contains 292500 sequences.