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Search: id:A108769
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A108769 Numbers n such that n^2 + (n+1)^2 is a semiprime. +0
1
3, 6, 8, 10, 11, 13, 15, 16, 18, 20, 26, 27, 31, 33, 37, 38, 40, 43, 44, 45, 48, 51, 52, 54, 55, 56, 57, 59, 62, 63, 64, 67, 68, 73, 74, 75, 76, 77, 80, 81, 83, 89, 92, 94, 98, 105, 107, 111, 112, 113, 114, 117, 120, 123, 124, 129, 131, 133, 134, 138, 140, 141, 142, 143 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Cf. A001358, A027861.

Sequence in context: A159264 A055073 A012132 this_sequence A112234 A023983 A159061

Adjacent sequences: A108766 A108767 A108768 this_sequence A108770 A108771 A108772

KEYWORD

easy,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jun 25 2005

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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