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

1,1

Links

Table of n, a(n) for n=1..35.

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

Example

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

Crossrefs

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

Sequence in context: A273649 A272994 A273674 * A214811 A121565 A107733

Adjacent sequences: A360964 A360965 A360966 * A360968 A360969 A360970

Keyword

tabl,nonn,easy

Author

R. J. Mathar, Feb 27 2023

Status

approved