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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

Table of n, a(n) for n=1..13.

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 November 18 01:20 EST 2018. Contains 317279 sequences. (Running on oeis4.)