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A188226
Smallest number having exactly n divisors of the form 8*k + 7.
7
1, 7, 63, 315, 945, 1575, 3465, 19845, 10395, 17325, 26775, 127575, 45045, 266805, 190575, 155925, 135135, 2480625, 225225, 130203045, 405405, 1289925, 2168775, 1715175, 675675, 3898125, 3468465, 1576575, 3239775, 67798585575, 2027025, 16769025, 2297295, 20539575, 42170625, 27286875, 3828825, 117661005
OFFSET
0,2
COMMENTS
A188172(a(n)) = n and A188172(m) <> n for m < a(n).
LINKS
PROG
(Haskell)
import Data.List (elemIndex)
import Data.Maybe (fromJust)
a188226 n = a188226_list !! n
a188226_list =
map (succ . fromJust . (`elemIndex` (map a188172 [1..]))) [0..]
CROSSREFS
Smallest number having exactly n divisors of the form 8*k + i: A343104 (i=1), A343105 (i=3), A343106 (i=5), this sequence (i=7).
Sequence in context: A161201 A007291 A343137 * A055405 A100741 A043027
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 26 2011
EXTENSIONS
a(19)-a(35) from Nathaniel Johnston, Apr 06 2011
More terms from Bert Dobbelaere, Apr 09 2021
STATUS
approved