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 A082210 Square root of the squares arising in A082209. 4
 1, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248, 71, 4, 8, 7, 31, 248 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The squares are given in A090567. - M. F. Hasler, Nov 24 2015 LINKS Table of n, a(n) for n=1..78. Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 1). FORMULA a(n) = {A082209(n) concatenated with A082209(n+1)}^(1/2). Periodic with period 6 from n=2 onward. - Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 20 2003 a(n) = sqrt(A090567(n)) with A090567(n) = A082209(n) concat A243091(A082209(n)). - M. F. Hasler, Nov 24 2015 EXAMPLE a(3) = 31 = 961^(1/2) where A082209(3) = 9 and A082209(4) = 61. MATHEMATICA Join[{1}, LinearRecurrence[{0, 0, 0, 0, 0, 1}, {4, 8, 7, 31, 248, 71}, 77]] (* Ray Chandler, Aug 26 2015 *) PROG (PARI) A082210(n)=n<2||return([248, 71, 4, 8, 7, 31][n%6+1]) \\ M. F. Hasler, Nov 24 2015 CROSSREFS Cf. A082209. Sequence in context: A309665 A196205 A196141 * A196282 A196332 A245654 Adjacent sequences: A082207 A082208 A082209 * A082211 A082212 A082213 KEYWORD base,nonn AUTHOR Amarnath Murthy, Apr 10 2003 EXTENSIONS Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 20 2003 Definition corrected and minor edits by M. F. Hasler, Nov 24 2015 STATUS approved

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Last modified July 12 05:51 EDT 2024. Contains 374237 sequences. (Running on oeis4.)