| 5, 5, 13, 10, 25, 17, 41, 26, 61, 37, 85, 50, 113, 65, 145, 82, 181, 101, 221, 122, 265, 145, 313, 170, 365, 197, 421, 226, 481, 257, 545, 290, 613, 325, 685, 362, 761, 401, 841, 442, 925, 485, 1013, 530, 1105, 577, 1201, 626, 1301, 677, 1405, 730, 1513, 785
(list; graph; listen)
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OFFSET
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3,1
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FORMULA
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a(n)=sqrt(n^2+A055523(n)^2). a(2k)=k^2+1, a(2k+1)=k^2+(k+1)^2.
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CROSSREFS
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Cf. A009112, A046079, A046080, A046081, A054435, A054436, A055522, A055523, A055525, A055526, A055527.
Sequence in context: A049735 A055526 A146984 this_sequence A132981 A147280 A147494
Adjacent sequences: A055521 A055522 A055523 this_sequence A055525 A055526 A055527
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KEYWORD
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nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), May 22 2000
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