The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A036329 Composite numbers n such that juxtaposition of prime factors of n has length 5. 1
 32, 48, 72, 80, 88, 104, 108, 112, 120, 132, 136, 152, 156, 162, 168, 180, 184, 198, 200, 204, 220, 228, 232, 234, 242, 243, 248, 252, 260, 270, 276, 280, 286, 296, 297, 300, 306, 308, 328, 330, 338, 340, 342, 344, 348, 351, 363, 364, 372, 374, 376, 378 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The last term of this sequence is a(10077) = 96709. LINKS Nathaniel Johnston, Table of n, a(n) for n = 1..10077 (full sequence) MAPLE isA036329 := proc(n) local d: d:=ifactors(n)[2]: return `if`(not isprime(n) and add(length(d[j][1])*d[j][2], j=1..nops(d))=5, n, NULL): end: l:=[seq(isA036329(n), n=2..378)]; # Nathaniel Johnston, Jun 22 2011 MATHEMATICA jpf5Q[n_]:=Total[Flatten[Table[IntegerLength[#[[1]]], {#[[2]]}]&/@ FactorInteger[ n]]]==5; Select[Range[400], CompositeQ[#]&&jpf5Q[#]&] (* Harvey P. Dale, Jan 09 2015 *) CROSSREFS Cf. A036326-A036334. Sequence in context: A114447 A090052 A163285 * A014614 A046371 A175162 Adjacent sequences:  A036326 A036327 A036328 * A036330 A036331 A036332 KEYWORD nonn,base,fini,full,easy AUTHOR Patrick De Geest, Dec 15 1998 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 17 17:05 EDT 2021. Contains 345085 sequences. (Running on oeis4.)