A260211 Irregular triangle read by rows, T(n,k) is the decimal number conversion from an n-bit symmetric binary table arranged in ascending order for n > 1.

0, 1, 0, 3, 0, 2, 5, 7, 0, 6, 9, 15, 0, 4, 10, 14, 17, 21, 27, 31, 0, 12, 18, 30, 33, 45, 51, 63, 0, 8, 20, 28, 34, 42, 54, 62, 65, 73, 85, 93, 99, 107, 119, 127, 0, 24, 36, 60, 66, 90, 102, 126, 129, 153, 165, 189, 195, 219, 231, 255

Offset: 1

Author

Kival Ngaokrajang, Jul 19 2015

Keywords

• nonn
• easy
• tabf

Comments

The sequence of row lengths is A060546(n).

Column 2 is A164073. See illustration.

Examples

			The irregular triangle begins:
n\k 0  1  2  3  4  5  6  7 ...
1   0  1
2   0  3
3   0  2  5  7
4   0  6  9 15
5   0  4 10 14 17 21 27 31
6   0 12 18 30 33 45 51 63
...
		

Links

• Kival Ngaokrajang, Illustration of initial terms

Crossrefs

Cf. A060546, A164073.

Programs

Mathematica

Flatten[Table[Select[Range[0,2^k -1], #==IntegerReverse[#,2,k]&],{k,1,8}]] (* Ed Pegg Jr, May 03 2021 *)