The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A046275 Largest prime substring in 9^n (0 if none). 3
 0, 0, 0, 29, 61, 9049, 53, 7829, 3046721, 89, 84401, 1381, 2429536481, 8329, 876792454961, 113209, 853020188851, 77181699666569, 15009463529, 35085171767, 2157665459056928801, 1094189891315123, 984770902183 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Harvey P. Dale, Table of n, a(n) for n = 0..100 MATHEMATICA lps[n_]:=Module[{c=9^n}, Max[Select[FromDigits/@Flatten[Table[ Partition[ IntegerDigits[c], i, 1], {i, IntegerLength[c]-1, 1, -1}], 1], PrimeQ]]]; Join[ {0, 0, 0}, Array[lps, 20, 3]] (* Harvey P. Dale, May 07 2015 *) CROSSREFS Cf. A046267. Sequence in context: A173032 A142047 A335329 * A092222 A338529 A039516 Adjacent sequences:  A046272 A046273 A046274 * A046276 A046277 A046278 KEYWORD nonn AUTHOR Patrick De Geest, Jun 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 22 06:54 EDT 2022. Contains 353933 sequences. (Running on oeis4.)