A049069 Array T read by antidiagonals: T(k,n) = k*n*2^(n-1) + 1, n >= 0, k >= 1.

1, 1, 2, 1, 3, 5, 1, 4, 9, 13, 1, 5, 13, 25, 33, 1, 6, 17, 37, 65, 81, 1, 7, 21, 49, 97, 161, 193, 1, 8, 25, 61, 129, 241, 385, 449, 1, 9, 29, 73, 161, 321, 577, 897, 1025, 1, 10, 33, 85, 193, 401, 769, 1345, 2049, 2305, 1, 11, 37, 97, 225, 481, 961, 1793, 3073, 4609, 5121

Offset: 0

Author

N. J. A. Sloane, Clark Kimberling, Michael Somos

Keywords

• nonn
• tabl
• easy

Examples

			Antidiagonals: {1}; {1,2}; {1,3,5}; ...
		

Crossrefs

Transpose of the array in A048472.

Row 1 = (1, 2, 5, 13, 33, ...) = A005183.

Row 2 = (1, 3, 9, 25, 65, ...) = A002064.

Cf. A049513.

Essentially the same as A049513.

Programs

PARI

T(k,n)=k*n*2^(n-1)+1