A174028 Triangle T(n,k) = 2+4k read by rows.

2, 2, 6, 2, 6, 10, 2, 6, 10, 14, 2, 6, 10, 14, 18, 2, 6, 10, 14, 18, 22, 2, 6, 10, 14, 18, 22, 26, 2, 6, 10, 14, 18, 22, 26, 30, 2, 6, 10, 14, 18, 22, 26, 30, 34, 2, 6, 10, 14, 18, 22, 26, 30, 34, 38

Offset: 0

Author

Paul Curtz, Mar 06 2010

Keywords

• nonn
• easy
• tabl

Examples

			2;
2, 6;
2, 6, 10;
2, 6, 10, 14;
2, 6, 10, 14, 18;
2, 6, 10, 14, 18, 22;
2, 6, 10, 14, 18, 22, 26;
		

Links

• Wikipedia, Electron shell

Crossrefs

Cf. A001105 (row sums), A167268.

Formula

T(n,k) = A016825(k).

T(n,k) = 2*A158405(n+1,k).