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1, 3, 7, 10, 19, 24, 40, 46, 71, 78, 114, 122, 171, 181, 245, 256, 337, 349, 449, 462, 583, 597, 741, 756, 925, 942, 1138, 1156, 1381, 1400, 1656, 1676, 1965, 1986, 2310, 2332, 2693, 2716, 3116, 3140, 3581, 3607, 4091, 4118, 4647, 4675, 5251, 5280, 5905, 5935
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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FORMULA
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Set R(N)=N+ROUND(SQRT(N),0), S(N)=FLOOR(SQRT(R(N))), U(N)=R(N)*(R(N)+1)/2-S(N)*(S(N)+1)*(S(N)+.5)/3, T(N)=CEILING(N/2), then a(N)=T(N)*(1+T(N)*(3+2*T(N)))/6+U(FLOOR(N/2))
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EXAMPLE
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a(14)=1+2+4+3+9+5+16+6+25+7+36+8+49+10=181
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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