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 A083554 Least common multiple of p[n+1]-1 and p[n]-1. 1
 2, 4, 12, 30, 60, 48, 144, 198, 308, 420, 180, 360, 840, 966, 1196, 1508, 1740, 660, 2310, 2520, 936, 3198, 3608, 1056, 2400, 5100, 5406, 5724, 3024, 1008, 8190, 8840, 9384, 10212, 11100, 3900, 4212, 13446, 14276, 15308, 16020, 3420, 18240, 9408 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n)=LCM[A006093(n+1), A006093(n)]=LCM[p(n+1)-1, p(n)-1]. EXAMPLE n=25: a(25)=LCM(97-1),(101-1)]=LCM[96,100]=2400 MATHEMATICA f[x_] := Prime[x]-1 Table[LCM[f[w+1], f[w]], {w, 1, 128}] CROSSREFS Cf. A006093, A083538-A083555, A058263. Sequence in context: A215871 A130135 A048618 * A059412 A079472 A006948 Adjacent sequences:  A083551 A083552 A083553 * A083555 A083556 A083557 KEYWORD nonn AUTHOR Labos E. (labos(AT)ana.sote.hu), May 22 2003 STATUS approved

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Last modified June 18 21:17 EDT 2013. Contains 226356 sequences.