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A120762
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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, 5, 26, 131, 17162, 2248223, 5054506657730, 11363658121561713791, 25548037553031840864343394, 57437685631589904363556698288863, 129132725903709949557948530897082440450
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| Among the first 3 terms of the sequence, 5 is the largest prime. So a(4) = a(3)*5 +1 = 26*5 + 1 = 131.
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PROG
| (PARI) {m=11; 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. A120763.
Sequence in context: A178390 A045903 A090878 * A072268 A019014 A128595
Adjacent sequences: A120759 A120760 A120761 * A120763 A120764 A120765
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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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