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Search: id:A096280
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| A096280 |
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Prime first term of iterated successive sums of successive sums of successive primes. Also numbers n such that A007443(n) is prime. |
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+0
1
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| 5, 13, 83, 2707, 71475193, 674721797, 6245693407, 118543624847, 82736199371081, 72298621492552303967009812018997, 2454725173623452943975951834280921, 59966692897276736774965300014477948187539553
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Sum of reciprocals = 0.2893406979695919267175673140... Are these primes infinite?
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PROGRAM
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(PARI) \ n = terms to add, m = order. sucsumspr(n, m) = { local(a, b, i, j, k, sr); sr=0; a = primes(1001); b = vector(1001); for(i=1, m, for(j=1, n+n, b[j] = a[j]+ a[j+1]; ); a=b; if(isprime(a[1]), print1(a[1]", "); sr+=1.0/a[1]); ); print(); print(sr); }
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CROSSREFS
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Sequence in context: A027612 A027457 A113876 this_sequence A165262 A092955 A081560
Adjacent sequences: A096277 A096278 A096279 this_sequence A096281 A096282 A096283
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Jun 23 2004
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