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 A086143 Palindromes of the form n^3 + n^2 + n + 1. 0
 4, 585, 1111, 99499, 1010101, 1001001001, 1000100010001, 1000010000100001, 1000001000001000001, 1000000100000010000001, 1000000010000000100000001, 1000000001000000001000000001, 1000000000100000000010000000001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Values of n are 1, 8, 10, 46, 100, 1000, etc. LINKS Index entries for linear recurrences with constant coefficients, signature (1111,-112110,1111000,-1000000). MATHEMATICA f[n_] := (n^3 + n^2 + n + 1); a = Select[ Range[10^7], FromDigits[ Reverse[ IntegerDigits[ f[ # ]]]] == f[ # ] & ]; a^3 + a^2 + a + 1 Select[Table[n^3+n^2+n+1, {n, 10^7}], #==IntegerReverse[#]&] (* The program uses the IntegerReverse function from Mathematica version 10 *) (* Harvey P. Dale, Apr 14 2016 *) CROSSREFS Sequence A028414 deals with n^2 + n + 1. Sequence in context: A177963 A102201 A102204 * A123657 A195580 A069641 Adjacent sequences:  A086140 A086141 A086142 * A086144 A086145 A086146 KEYWORD base,nonn AUTHOR Karl Goiser (kggoiser(AT)utas.edu.au), Aug 24 2003 EXTENSIONS More terms from Robert G. Wilson v, Sep 01 2003 More terms fdrom Harvey P. Dale, Apr 14 2016 STATUS approved

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Last modified January 24 02:04 EST 2019. Contains 319407 sequences. (Running on oeis4.)