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Search: id:A085321
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| A085321 |
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First difference sequence of A003337, i.e. consecutive differences between those consecutive numbers which are sums of three 4th powers. |
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+0
2
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| 15, 15, 15, 35, 15, 15, 50, 15, 65, 15, 15, 15, 50, 15, 65, 95, 15, 65, 34, 15, 15, 50, 15, 46, 19, 95, 15, 65, 175, 114, 15, 32, 15, 15, 3, 47, 15, 65, 48, 47, 15, 65, 175, 67, 47, 15, 65, 175, 226, 15, 15, 50, 15, 48, 17, 30, 15, 50, 15, 65, 110, 65, 114, 15, 65, 110, 65
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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48=16+16+16,83=81+1+1, 81-48=35=a(4);
Certain differences occur consequently like
15,30,31,32,49,50,64,65,175, etc..;
Distance of closest neighbors equals 1,
like those of 7202=6561+625+16 and 7203=2401+2401+2401.
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MATHEMATICA
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{m=12, k=5, m^k}; t=Union[Flatten[Table[Table[Table[Table[w^k+q^k+t^k+u^k, {w, 1, m}], {q, 1, m}], {t, 1, m}], {u, 1, m}]]]; Length[t]; dt=Delete[ -RotateRight[t]+t, 1]; Sort[dt]
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CROSSREFS
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Cf. A003337, A003327-A003399.
Sequence in context: A069785 A010854 A003884 this_sequence A003890 A040211 A003891
Adjacent sequences: A085318 A085319 A085320 this_sequence A085322 A085323 A085324
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jul 01 2003
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