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Search: id:A161180
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| A161180 |
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Sum of primes between n^2 and n^2+n, n^2+n and (n+1)^2. The only intervals for which n^2+n is prime are [1,2], [2,4] and the endpoint 2 is included in the sum. One might have written 0,3,5,7,..., etc. |
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+0
1
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| 2, 5, 5, 7, 11, 13, 36, 23, 29, 31, 78, 90, 53, 120, 128, 152, 172
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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On [1,2] the sum of primes is 2. For [2,4] the sum is 5. [4,6]: 5, [6,9]: 7, [9,12]: 11, [12,16]: 13, [16,20]: 17+19 = 36.
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CROSSREFS
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Cf. A160907
Sequence in context: A082087 A023850 A142353 this_sequence A101858 A165917 A165898
Adjacent sequences: A161177 A161178 A161179 this_sequence A161181 A161182 A161183
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KEYWORD
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easy,nonn
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AUTHOR
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Daniel Tisdale (daniel6874(AT)gmail.com), Jun 05 2009
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