A354576 - OEIS

%I #14 Nov 11 2023 08:50:26

%S 1,3,1,5,7,9,3,1,5,11,13,7,3,1,5,9,15,17,11,7,3,1,5,9,13,19,21,15,23,

%T 25,27,17,11,19,29,31,21,13,7,3,1,5,9,15,23,33,35,25,17,11,7,3,1,5,9,

%U 13,19,27,37,39,29,21,15,23,31,41

%N Variant of A253028 using only odd numbers: a mirror symmetric array of odd numbers where the n-th term is equal to the number of terms in the n-th row of the array.

%C See the examples in A253028 for a detailed illustration of how the array is constructed.

%H Neal Gersh Tolunsky, <a href="/A354576/b354576.txt">Table of n, a(n) for n = 1..10000</a>

%H Rémy Sigrist, <a href="/A354576/a354576.gp.txt">PARI program</a>

%e 1.......................1

%e 2.....................3,1,5

%e 3.......................7

%e 4...................9,3,1,5,11

%e 5................13,7,3,1,5,9,15

%e 6.............17,11,7,3,1,5,9,13,19

%e 7................... 21,15,23

%e 8...................... 25

%e 9.................27,17,11,19,29

%e 10.........31,21,13,7,3,1,5,9,15,23,33

%e 11......35,25,17,11,7,3,1,5,9,13,19,27,37

%e 12.............39,29,21,15,23,31,41

%o (PARI) See Links section.

%Y Cf. A253028, A354577.

%K nonn,tabf

%O 1,2

%A _Felix Fröhlich_, May 30 2022