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A174479
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Triangle read by rows: R(n,k)= semiprime(n) mod A065516(k), where A065516 are differences between consecutive semiprimes.
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2
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0, 0, 0, 1, 0, 0, 0, 1, 0, 2, 0, 2, 0, 2, 0, 1, 0, 0, 3, 0, 3, 1, 0, 0, 1, 0, 3, 0, 0, 1, 0, 2, 0, 4, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 2, 0, 2, 0, 2, 0, 2, 0, 5, 1, 0, 0, 1, 0, 3, 0, 0, 0, 5, 0, 0, 1, 0, 2, 0, 4, 0, 1, 0, 6, 0, 0, 1, 2, 0, 3, 0, 5, 0, 2, 0, 0, 0, 0, 2
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OFFSET
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1,10
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LINKS
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Table of n, a(n) for n=1..91.
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EXAMPLE
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The triangle starts in row n=1 with columns 1<=k<=n as:
0;
0, 0;
1, 0, 0;
0, 1, 0, 2;
0, 2, 0, 2, 0;
1, 0, 0, 3, 0, 3;
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MAPLE
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A001358 := proc(n) if n= 1 then 4; else for a from procname(n-1)+1 do if numtheory[bigomega](a) = 2 then return a; end if; end do; end if; end proc:
A065516 := proc(n) A001358(n+1)-A001358(n) ; end proc:
A174479 := proc(n, k) A001358(n) mod A065516(k) ; end proc:
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CROSSREFS
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Cf. A001358, A174433.
Sequence in context: A103271 A029832 A320535 * A134269 A335622 A172444
Adjacent sequences: A174476 A174477 A174478 * A174480 A174481 A174482
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KEYWORD
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nonn,easy,tabl
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AUTHOR
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Juri-Stepan Gerasimov, Nov 28 2010
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STATUS
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approved
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