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A047800
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Number of different values of i^2+j^2 for i,j in [ 0,n ].
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5
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1, 3, 6, 10, 15, 20, 27, 34, 42, 51, 61, 71, 83, 94, 106, 120, 135, 148, 165, 180, 198, 216, 235, 252, 273, 294, 315, 337, 360, 382, 408, 431, 457, 484, 508, 536, 567, 595, 624, 653, 687, 715, 749, 781, 813, 850, 884, 919, 957, 993, 1031, 1069, 1108, 1142
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| T. D. Noe, Table of n, a(n) for n=0..500
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MATHEMATICA
| Table[ Length@Union[ Flatten[ Table[ i^2+j^2, {i, 0, n}, {j, 0, n} ] ] ], {n, 0, 49} ]
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CROSSREFS
| Cf. A034966, A047801.
Sequence in context: A027920 A033438 A037452 * A109443 A138777 A096895
Adjacent sequences: A047797 A047798 A047799 * A047801 A047802 A047803
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KEYWORD
| nonn,easy,nice
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AUTHOR
| wouter.meeussen(AT)pandora.be
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