OFFSET
0,14
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..8269
John Tyler Rascoe, PARI code.
EXAMPLE
a(16) = 4: (1,2,1,2,1,2,1,2,1,2,1), (1,2,1,3,2,3,1,2,1), (1,2,3,1,2,1,3,2,1), (1,2,3,4,3,2,1).
MAPLE
b:= proc(n, m, l) option remember; `if`(n<=m+1 and n>0 and n<>l, 1, 0)+
add(`if`(j=l, 0, b(n-2*j, max(m, j), j)), j=1..min(n/2, m+1))
end:
a:= n-> `if`(n=0, 1, b(n, 0$2)):
seq(a(n), n=0..58); # Alois P. Heinz, Aug 25 2026
PROG
(PARI) \\ see links
CROSSREFS
KEYWORD
nonn,new
AUTHOR
John Tyler Rascoe, Aug 24 2026
STATUS
approved