OFFSET
0,2
COMMENTS
a(n) is the smallest nonnegative k such that A216278(k) = n. - Seiichi Manyama, Aug 22 2026
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..100
FORMULA
All terms are multiples of 3.
EXAMPLE
3 = 1+2*1^2.
27 = 3+2*3^2 = 5^2+2*1^2.
99 = 1+2*7^2 = 7^2+2*5^2 = 9^2+2*3^2.
CROSSREFS
KEYWORD
nonn,changed
AUTHOR
Zak Seidov, Nov 29 2011
EXTENSIONS
a(0)=0 prepended and a(22), a(23), a(28), a(29), and a(31) corrected by Seiichi Manyama, Aug 22 2026
STATUS
approved