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A004434
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Numbers that are the sum of 5 distinct nonzero squares.
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2
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55, 66, 75, 79, 82, 87, 88, 90, 94, 95, 99, 100, 103, 106, 110, 111, 114, 115, 118, 120, 121, 123, 126, 127, 129, 130, 131, 132, 134, 135, 138, 139, 142, 143, 144, 145, 146, 147, 148, 150, 151, 152, 154, 155, 156, 157, 158, 159, 160, 162, 163
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Paul T. Bateman, Adolf J. Hildebrand, and George B. Purdy, Sums of distinct squares, Acta Arithmetica 67 (1994), pp. 349-380.
Index entries for sequences related to sums of squares
Index to sequences with linear recurrences with constant coefficients, signature (2,-1).
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FORMULA
| a(n) = n + 124 for n > 121. [Charles R Greathouse IV, Jul 17 2011]
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PROG
| (PARI) upto(lim)=my(v=List(), tb, tc, td, te); for(a=5, sqrt(lim), for(b=4, min(a-1, sqrt(lim-a^2)), tb=a^2+b^2; for(c=3, min(b-1, sqrt(lim-tb)), tc=tb+c^2; for(d=2, min(c-1, sqrt(lim-tc)), td=tc+d^2; for(e=1, d-1, te=td+e^2; if(te>lim, break, listput(v, te))))))); vecsort(Vec(v), , 8) \\ Charles R Greathouse IV, Jul 17 2011
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CROSSREFS
| Sequence in context: A039356 A043179 A043959 * A168109 A116055 A068898
Adjacent sequences: A004431 A004432 A004433 * A004435 A004436 A004437
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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