login
A241920
After a(1)=1, each n appears A061395(n) times, where A061395 gives the index of the largest prime factor of n.
3
1, 2, 3, 3, 4, 5, 5, 5, 6, 6, 7, 7, 7, 7, 8, 9, 9, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 16, 17, 17, 17, 17, 17, 17, 17, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22
OFFSET
1,2
COMMENTS
Only numbers that occur just once are the powers of two (A000079).
LINKS
PROG
(Scheme, with Antti Karttunen's IntSeq-library)
(define A241920 (COMPOSE-FUNS (LEAST-GTE-I 0 1 A203623) -1+))
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 01 2014
STATUS
approved