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A086760
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a(n) = 8n^2 + 88n + 43.
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0
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43, 139, 251, 379, 523, 683, 859, 1051, 1259, 1483, 1723, 1979, 2251, 2539, 2843, 3163, 3499, 3851, 4219, 4603, 5003, 5419, 5851, 6299, 6763, 7243, 7739, 8251, 8779, 9323, 9883, 10459, 11051, 11659, 12283, 12923, 13579, 14251, 14939, 15643, 16363, 17099
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OFFSET
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0,1
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COMMENTS
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The start of the sequence is rich in primes.
The first nonprime (for n >= 0) occurs at n=27. Also 449 of the first 1000 terms are nonprimes and half of the first 1516 terms are nonprimes. - Harvey P. Dale, Sep 29 2016
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LINKS
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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Evangelos (eg(AT)chemodel.com), Aug 01 2003
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EXTENSIONS
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STATUS
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approved
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