OFFSET
1,2
COMMENTS
Apparently an arrangement of positive integers. Among the first 1000 terms in the sequence, the first absent numbers are: 809,890,902,908,920,926,932,938,944,945,963,968,977,986,998. Fixed points of the arrangement are: 1,2,3,4,6,61,106,137,419,452,486,557,730.
LINKS
Zak Seidov, Tableof n, a(n) for n = 1..1000
EXAMPLE
n=7: ss={1,2,3,4,7,6}, max(ss)=7; a(7)=the least positive number d not yet in ss such that max(ss)+d is prime, d=10, 7+10=17, hence a(7)=10.
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Nov 26 2006
STATUS
approved