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A120763
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a(1) = 2. a(n) = a(n-1)*(largest prime occurring earlier in the sequence) - 1.
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1
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2, 3, 8, 23, 528, 12143, 147452448, 1790515076063, 21742224568633008, 264015832936910616143, 3205944259352905611824448, 38929781141322332844384272063, 472724332399077087729358215661008
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| Among the first 4 terms of the sequence, 23 is the largest prime. So a(5) = a(4)*23 -1 = 23*23 -1 = 528.
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PROG
| (PARI) {m=13; print1(a=2, ", "); v=[a]; for(n=2, m, b=a; v=vecsort(v); j=#v; a=0; while(a<1, k=v[j]; if(isprime(k), print1(a=b*k-1, ", "); v=concat(v, a), j--)))} - (Klaus Brockhaus, Aug 17 2006)
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CROSSREFS
| Cf. A120762.
Sequence in context: A006076 A086628 A032096 * A120708 A089847 A038561
Adjacent sequences: A120760 A120761 A120762 * A120764 A120765 A120766
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Jul 03 2006
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EXTENSIONS
| More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 17 2006
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