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 A180467 Six-digit integers that are concatenation and product of three 2-digit primes. 0
 111967, 112961, 113119, 113129, 115943, 116143, 117113, 137953, 191771, 196789, 197173, 199723, 233147, 237917, 237961, 296141, 312329, 314183, 378359, 378397, 431941, 612943 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS There are 22 such integers: 111967=19*71*83, 112961=37*43*71, 113119=31*41*89, 113129=29*47*83, 115943=23*71*71, 116143=37*43*73, 117113=17*83*83, 137953=29*67*71, 191771=37*71*73, 196789=47*53*79, 197173=37*73*73, 199723=29*71*97, 233147=53*53*83, 237917=53*67*67, 237961=47*61*83, 296141=43*71*97, 312329=53*71*83, 314183=41*79*97, 378359=71*73*73, 378397=47*83*97, 431941=61*73*97, 612943=71*89*97. LINKS Table of n, a(n) for n=1..22. EXAMPLE sp = p1<>p2 = q1*q2*q3: 111967 = 11<>19<>67 = 19*71*83, 112961 = 11<>29<>61 = 37*43*71. CROSSREFS Cf. A180344. Sequence in context: A237154 A203739 A172699 * A210131 A111332 A151841 Adjacent sequences: A180464 A180465 A180466 * A180468 A180469 A180470 KEYWORD nonn,base,fini,full AUTHOR Zak Seidov, Jan 19 2011 STATUS approved

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Last modified March 1 20:05 EST 2024. Contains 370443 sequences. (Running on oeis4.)