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A061886
Largest square less than or equal to sum of previous terms.
2
1, 1, 1, 1, 4, 4, 9, 16, 36, 64, 121, 256, 484, 961, 1936, 3844, 7569, 15129, 30276, 60516, 121104, 242064, 483025, 966289, 1932100, 3865156, 7728400, 15452761, 30902481, 61811044, 123609924, 247212729, 494439696, 988850916, 1977669841
OFFSET
0,5
LINKS
FORMULA
For n > 0: a(n) = A060984(n+1)-A060984(n) = A048760(A060984(n)).
EXAMPLE
a(6) = 9 since 1+1+1+1+4+4 = 12 and 9 is the largest square less than or equal to this.
PROG
(Haskell)
a061886 n = a061886_list !! n
a061886_list = 1 : zipWith (-) (tail a060984_list) a060984_list
-- Reinhard Zumkeller, Dec 24 2013
CROSSREFS
Cf. A061883.
Sequence in context: A304990 A263727 A133037 * A059815 A202670 A203003
KEYWORD
nonn
AUTHOR
Henry Bottomley, May 12 2001
EXTENSIONS
Formula corrected by Reinhard Zumkeller, Dec 24 2013
STATUS
approved