A174479 Triangle read by rows: T(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

Author

Juri-Stepan Gerasimov, Nov 28 2010

Keywords

• nonn
• easy
• tabl

Examples

			The triangle starts in row n=1 with columns 1 <= k <= n:
  0;
  0, 0;
  1, 0, 0;
  0, 1, 0, 2;
  0, 2, 0, 2, 0;
  1, 0, 0, 3, 0, 3;
		

Crossrefs

Cf. A001358, A174433.

Programs

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: