A360967 Array T(n,m) = (2^(m*(2*n+1))+1)/(2^m+1) read by antidiagonals.

3, 13, 11, 57, 205, 43, 241, 3641, 3277, 171, 993, 61681, 233017, 52429, 683, 4033, 1016801, 15790321, 14913081, 838861, 2731, 16257, 16519105, 1041204193, 4042322161, 954437177, 13421773, 10923, 65281, 266354561, 67662254017, 1066193093601, 1034834473201, 61083979321, 214748365

Offset: 1

Author

R. J. Mathar, Feb 27 2023

Keywords

• tabl
• nonn
• easy

Examples

			The array starts in row n=1 and column n=1 as
      3      13      57     241
     11     205    3641   61681
     43    3277  233017 15790321
    171   52429 14913081 4042322161
		

Links

• Quynh Nguyen, Jean Pedersen, and Hien T. Vu, New Integer Sequences Arising From 3-Period Folding Numbers, JIS vol 19 (2016) #16.3.1 table 3

Crossrefs

Cf. A007583 (col 1), A299960 (col 2).