

A087831


a(n) = a(abs(na(n1))) + a(a(abs(na(n4)))) if n>4, a(n) = 1 otherwise.


2



1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 7, 6, 7, 7, 7, 7, 7, 10, 7, 10, 10, 8, 10, 10, 10, 11, 10, 14, 10, 13, 14, 14, 11, 14, 14, 11, 15, 14, 14, 15, 15, 15, 18, 15, 17, 15, 18, 17, 19, 19, 18, 19, 19, 19, 16, 20, 20, 19, 20, 20, 20, 20, 23, 20, 22, 20, 23, 22, 23, 25
(list;
graph;
refs;
listen;
history;
text;
internal format)




