OFFSET
1,4
COMMENTS
Sequences like A280864 can be split into segments of consecutive terms with properties similar to the sequences S that we are considering here.
LINKS
Rémy Sigrist, C++ program
FORMULA
a(n) <= A373797(n).
a(p) = a(p-1) for any prime number p.
EXAMPLE
Some solutions for small n:
n a(n) Solution S
-- ---- --------------------------------------------------------------
1 1 1
4 2 2,4
6 3 2,6,3
10 4 3,6,10,5
15 7 3,6,10,15,12,14,7
21 10 3,6,10,15,12,14,21,18,20,5
33 13 3,6,10,15,12,14,21,18,22,33,24,20,5
35 16 3,6,10,15,12,14,21,18,20,35,28,22,33,24,26,13
39 19 3,6,10,15,12,14,21,18,20,35,28,22,33,24,26,39,36,34,17
45 22 5,10,6,15,20,12,21,14,18,33,22,24,39,26,36,45,40,28,35,30,42,7
PROG
(C++) // See Links section.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Rémy Sigrist, Jul 28 2024
STATUS
approved