OFFSET
1,1
COMMENTS
FORMULA
b(n)=n+floor(sqrt((1/3)n^2+1/24))=A186539(n).
a(n)=n+floor(sqrt(3n^2-3/2)).
EXAMPLE
First, write
1..4..9..16..25..36..49..i^2)
.......10....25....46.. (-2+3j^2)
Then replace each number by its rank, where ties are settled by ranking i^2 before -2+3j^2:
b=(1,3,4,6,7,9,11,12,14,15,17,18,..)=A186539
a=(2,5,8,10,13,16,19,21,24,27,30...).
MATHEMATICA
(See A186539.)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Feb 23 2011
STATUS
approved