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 A171551 Numbers n with property that decimal expansion of 3^n-2^n contains no pair of neighbor equal digits (probably finite). 1
 0, 1, 2, 3, 4, 7, 8, 9, 10, 12, 13, 15, 18, 20, 21, 22, 23, 24, 26, 27, 29, 37, 50 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Table of n, a(n) for n=0..22. EXAMPLE 50 is a term because 3^50-2^50 = 717897986565952681927625, while 49 is not because 3^49-2^49 = 2392(99)328(66)7(66)7576168(77)1 (four pairs of neighbor equal digits). MATHEMATICA Reap[Do[id=IntegerDigits[3^m-2^m]; rm=Rest[id]-Most[id]; If[FreeQ[rm, 0], Sow[m]], {m, 0, 10000}]][[2, 1]] CROSSREFS Cf. A050723 (2^n), A050724 (3^n), A171550 (3^n+2^n). Sequence in context: A121405 A330217 A231003 * A096199 A104576 A332485 Adjacent sequences: A171548 A171549 A171550 * A171552 A171553 A171554 KEYWORD base,fini,full,nonn AUTHOR Zak Seidov, Dec 11 2009 STATUS approved

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Last modified June 21 03:54 EDT 2024. Contains 373540 sequences. (Running on oeis4.)