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A130052 Numbers that are the sum of one or more consecutive squares in more than one way. 7
25, 365, 841, 1405, 1730, 2030, 3281, 3655, 3740, 4510, 4705, 4760, 4900, 5244, 5434, 5915, 5929, 7230, 7574, 8415, 8464, 9385, 11055, 11236, 11900, 12325, 12524, 14905, 16745, 17484, 18879, 19005, 19044, 19855, 20449, 20510, 21790, 22806, 23681 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Paul Richards and David W. Wilson, Table of n, a(n) for n = 1..10000 (first 135 terms from Paul Richards)

EXAMPLE

25 = 3^2 + 4^2 = 5^2.

365 = 10^2 + 11^2 + 12^2 = 13^2 + 14^2.

PROG

(PARI) ok(n) = {my(i=sqrtint(n), m=0); while(i>0&&m<2, my(a=i^2, j=i); while(j>0&&a<=n, if(a==n, m+=1); j-=1; a=a+j^2); i-=1); return(m>1)}

{for(p=1, 24000, if(ok(p), print1(p, ", ")))} \\ Antonio Roldán, Mar 09 2020

CROSSREFS

Cf. A059255 (subsequence).

Sequence in context: A197678 A197536 A045622 * A059255 A227024 A254376

Adjacent sequences:  A130049 A130050 A130051 * A130053 A130054 A130055

KEYWORD

nonn

AUTHOR

Paul Richards, May 03 2007

EXTENSIONS

Extended by Ray Chandler, May 04 2007

STATUS

approved

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Last modified August 7 17:38 EDT 2020. Contains 336278 sequences. (Running on oeis4.)