OFFSET
1,2
COMMENTS
For any term a(n) == 0 (mod 4), the three terms 4*a(n)+{1,2,3} are also in {a(n)}. If a(n) == 3 (mod 4), except for a(3)=3, then 4*a(n)+{0,1,2} are in the sequence. - Christian N. K. Anderson, May 24 2024
LINKS
Christian N. K. Anderson, Table of n, a(n) for n = 1..10000
EXAMPLE
The numbers {24, 25, 28, 29, 30, 44, 45, 46} are in the sequence because in base-4 they are {120, 121, 130, 131, 132, 230, 231, 232}, i.e., all the three-digit base-4 numbers that fit the pattern. - Christian N. K. Anderson, May 24 2024
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved