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A055514
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Composite numbers that are the sum of a string of consecutive prime numbers and are divisible by the first and last primes.
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5
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OFFSET
| 1,1
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COMMENTS
| Composite n such that n = p_1 + p_2 + ... + p_k where the p_i are consecutive primes and n is divisible by p_1 and p_k.
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REFERENCES
| Problem proposed by Carlos Rivera, who found first 4 terms.
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LINKS
| C. Rivera, Puzzle
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EXAMPLE
| 503 + 509 + 521+ ... + 508213 = 10225245560, which is divisible by 503 and 508213. - Manuel Valdivia, Nov 17 2011
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CROSSREFS
| Cf. A055233.
Sequence in context: A188480 A059722 A074225 * A055233 A189947 A197705
Adjacent sequences: A055511 A055512 A055513 * A055515 A055516 A055517
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KEYWORD
| nice,nonn
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AUTHOR
| Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu), Jul 03 2000
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EXTENSIONS
| 7228559051256366318 = 73+79+83+ ... +18281691653 is also in the sequence but may not be the next term.
a(7) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Jun 19 2008
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