OFFSET
1,2
COMMENTS
See the examples in A253028 for a detailed illustration of how the array is constructed.
LINKS
Neal Gersh Tolunsky, Table of n, a(n) for n = 1..10000
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
KEYWORD
nonn,tabf
AUTHOR
Felix Fröhlich, May 30 2022
STATUS
approved