A090321 T(n,k) = prime(n+1) - prime(n-k+1), 1<=k<=n, triangular array read by rows.

1, 2, 3, 2, 4, 5, 4, 6, 8, 9, 2, 6, 8, 10, 11, 4, 6, 10, 12, 14, 15, 2, 6, 8, 12, 14, 16, 17, 4, 6, 10, 12, 16, 18, 20, 21, 6, 10, 12, 16, 18, 22, 24, 26, 27, 2, 8, 12, 14, 18, 20, 24, 26, 28, 29, 6, 8, 14, 18, 20, 24, 26, 30, 32, 34, 35, 4, 10, 12, 18, 22, 24, 28, 30, 34, 36, 38

Offset: 1

Author

Reinhard Zumkeller, Jan 26 2004

Keywords

• nonn
• tabl

Comments

Row-reversed A086800. - R. J. Mathar, Sep 15 2012

Examples

			1;
2, 3;
2, 4, 5;
4, 6, 8, 9;
2, 6, 8, 10, 11;
4, 6, 10, 12, 14, 15;
		

Links

• Eric Weisstein's World of Mathematics, Prime Difference Function

Crossrefs

Cf. A000040.

Formula

T(n,1) = A001223(n); T(n,n) = A040976(n).