OFFSET
1,2
LINKS
EXAMPLE
A287928(11) = 12, hence a(12) = 11.
A287928(12) = 11, hence a(11) = 12.
A287928(14) = 15, hence a(15) = 14.
A287928(15) = 14, hence a(14) = 15.
A287928(17) = 18, hence a(18) = 17.
A287928(18) = 17, hence a(17) = 18.
A287928(21) = 23, hence a(23) = 21.
A287928(22) = 21, hence a(21) = 22.
A287928(23) = 24, hence a(24) = 23.
A287928(24) = 22, hence a(22) = 24.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Jun 03 2017
STATUS
approved