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Search: id:A075406
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| A075406 |
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a(n) is the number of terms in the sum in A075405 (or 0 if no such square exists). |
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+0
3
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| 24, 11765499, 2, 2365881, 6725418, 9219179, 23, 5613922, 24, 3846107, 22898, 10049506, 96, 6783872, 97, 5332865, 23, 11, 14068401, 2, 96, 59, 7659448, 135128, 24, 14010075, 33, 50, 2021233, 169, 7448023, 578
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(1) = 25 because the sum 1^2+...+24^2 consists of 25 terms, see A075404.
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MATHEMATICA
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n=32; sp=", "; Do[If[IntegerQ[b=(a(a+1)(2a+1)/6-(k(k+1)(2k+1)/6)/.k->(n-1))^(1/2)], Print[n, sp, a, sp, b, sp, m=a-n+1]], {a, n+1, 400000}]
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CROSSREFS
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Cf. A000330, A075404, A075405.
Sequence in context: A088020 A159191 A013820 this_sequence A075404 A141643 A013910
Adjacent sequences: A075403 A075404 A075405 this_sequence A075407 A075408 A075409
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Sep 13 2002
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EXTENSIONS
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Corrected and extended by Lior Manor (lior.manor(AT)gmail.com) Sep 19 2002
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