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4, 6, 6, 6, 0, 12, -6, 0, 6, 0, 0, -24, 18, 6, 0, 0, 0, 24, 42, -24, -42, 48, 18, -30, -30, -6, 0, 126, -6, -144, 18, 18, 108, -12, -120, 0, 12, 48, 48, -12, -66, -36, 6, 96, 6, -78, -18, 90, 6, -72, 18, -24, 36, 60, -60, -30, 12, -6, 12, 6, -24, -30, 12, -12, 78, 18, -54, 0, 0, 138, 0, -102, -12, -42
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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6*k appears for the form of a(n) for n > 1.
What is the most repeated value of a(n)?
See A270535 for the position of 0's in this sequence.
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LINKS
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FORMULA
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EXAMPLE
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MATHEMATICA
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PROG
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(PARI) t(n, p=3) = { while( p+2 < (p=nextprime( p+1 )) || n-->0, ); p-2}
a(n) = t(n) + t(n+3) - t(n+1) - t(n+2);
for(n=1, 200, print1(a(n), ", "));
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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