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 A093212 a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 12. 87
 0, 72484, 97204804, 99720048004, 99972000480004, 99997200004800004, 99999720000048000004, 99999972000000480000004, 99999997200000004800000004, 99999999720000000048000000004 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Observation: at least for the first nine positive terms a(n) is also the concatenation of n-2 9´s, 72, n-2 0's, 48, n-2 0's, and 4. - Omar E. Pol, May 21 2017 LINKS Table of n, a(n) for n=1..10. Hans Havermann, Table of A093211-A093299 EXAMPLE a(2) is 72484 because its length-2 substrings (72, 24, 48, 84) are all distinct and divisible by 12 and there is no larger number with this property CROSSREFS Cf. A093211, A093213, ..., A093299. Sequence in context: A251340 A183788 A369238 * A114258 A238151 A234243 Adjacent sequences: A093209 A093210 A093211 * A093213 A093214 A093215 KEYWORD base,nonn,more AUTHOR Hans Havermann, Mar 28 2004 EXTENSIONS a(8)-a(10) from John Cerkan, May 21 2017 STATUS approved

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Last modified April 24 10:11 EDT 2024. Contains 371935 sequences. (Running on oeis4.)