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A004435 Positive integers that are not the sum of 2 distinct square integers. 5
2, 3, 6, 7, 8, 11, 12, 14, 15, 18, 19, 21, 22, 23, 24, 27, 28, 30, 31, 32, 33, 35, 38, 39, 42, 43, 44, 46, 47, 48, 51, 54, 55, 56, 57, 59, 60, 62, 63, 66, 67, 69, 70, 71, 72, 75, 76, 77, 78, 79, 83, 84, 86, 87, 88, 91 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
A025435(a(n)) = 0. - Reinhard Zumkeller, Dec 20 2013
LINKS
MATHEMATICA
Select[Range[100], Reduce[0 <= i < j && # == i^2 + j^2, {i, j}, Integers] === False &] (* Jean-François Alcover, Aug 01 2018 *)
PROG
(Haskell)
a004435 n = a004435_list !! (n-1)
a004435_list = [x | x <- [1..], a025435 x == 0]
-- Reinhard Zumkeller, Dec 20 2013
CROSSREFS
Cf. A001983 (complement).
Sequence in context: A175893 A031470 A047223 * A008321 A064472 A276887
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)