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A354576
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.
3
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, 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, 13, 19, 27, 37, 39, 29, 21, 15, 23, 31, 41
OFFSET
1,2
COMMENTS
See the examples in A253028 for a detailed illustration of how the array is constructed.
LINKS
Rémy Sigrist, PARI program
EXAMPLE
1.......................1
2.....................3,1,5
3.......................7
4...................9,3,1,5,11
5................13,7,3,1,5,9,15
6.............17,11,7,3,1,5,9,13,19
7................... 21,15,23
8...................... 25
9.................27,17,11,19,29
10.........31,21,13,7,3,1,5,9,15,23,33
11......35,25,17,11,7,3,1,5,9,13,19,27,37
12.............39,29,21,15,23,31,41
PROG
(PARI) See Links section.
CROSSREFS
Sequence in context: A343615 A159285 A021080 * A049764 A136437 A137328
KEYWORD
nonn,tabf
AUTHOR
Felix Fröhlich, May 30 2022
STATUS
approved