A174479 Triangle read by rows: R(n,k)= semiprime(n) mod A065516(k), where A065516 are differences between consecutive semiprimes.

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

Offset

1,10

Links

Table of n, a(n) for n=1..91.

Example

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;

Maple

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:

Crossrefs

Cf. A001358, A174433.

Sequence in context: A029832 A361879 A320535 * A134269 A335622 A172444

Adjacent sequences: A174476 A174477 A174478 * A174480 A174481 A174482

Keyword

nonn,easy,tabl

Author

Juri-Stepan Gerasimov, Nov 28 2010

Status

approved