OFFSET
1,1
COMMENTS
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
EXAMPLE
. ----+--------------+------------+--------------
. 1 | 2 | 1 | 2
. 2 | 3 | 1 | 3
. 3 | 4 = 2*2 | 1 | 4
. 4 | 5 | 5 | 9
. 5 | 6 = 2*3 | 1 | 10
. 6 | 7 | 5 | 15
. 7 | 10 = 2*5 | 1 | 16
. 8 | 11 | 6 | 22
. 9 | 13 | 1 | 23
. 10 | 17 | 7 | 30
. 11 | 18 = 2*3*3 | 1 | 31
. 12 | 19 | 12 | 43
. 13 | 23 | 8 | 51
. 14 | 29 | 10 | 61
. 15 | 31 | 1 | 62
. 16 | 37 | 17 | 79
. 17 | 41 | 8 | 87
. 18 | 43 | 1 | 88
. 19 | 47 | 13 | 101
. 20 | 53 | 13 | 114
. 21 | 59 | 13 | 127
. 22 | 61 | 5 | 132
. 23 | 67 | 10 | 142
. 24 | 71 | 11 | 153
. 25 | 73 | 5 | 158
The last column gives the position of a(n) in A098550.
PROG
(Haskell)
import Data.List (group)
a251595 n = a251595_list !! (n-1)
a251595_list = map head $ group a251416_list
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Dec 05 2014
STATUS
approved