The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A271346 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A271346

Numbers k such that the final digit of k^k is 6.
(history; published version)

#30 by Charles R Greathouse IV at Thu Sep 08 08:46:16 EDT 2022

PROG

(MAGMAMagma) I:=[4, 6, 8, 12, 14, 16, 24]; [n le 7 select I[n] else Self(n-1)+Self(n-6)-Self(n-7): n in [1..60]]; // Vincenzo Librandi, Oct 09 2017

Discussion

Thu Sep 08

08:46

OEIS Server: https://oeis.org/edit/global/2944

#29 by Alois P. Heinz at Thu Dec 13 12:49:30 EST 2018

STATUS

proposed

approved

#28 by Colin Barker at Thu Dec 13 12:43:41 EST 2018

STATUS

editing

proposed

#27 by Colin Barker at Thu Dec 13 12:42:54 EST 2018

FORMULA

G.f.: 2*x*(1 + x^2)*(2 + x - x^2 + x^3 + 2*x^4) / ((1 - x)^2*(1 + x)*(1 - x + x^2)*(1 + x + x^2)). - Colin Barker, Dec 13 2018

PROG

(PARI) Vec(2*x*(1 + x^2)*(2 + x - x^2 + x^3 + 2*x^4) / ((1 - x)^2*(1 + x)*(1 - x + x^2)*(1 + x + x^2)) + O(x^59)) \\ Colin Barker, Dec 13 2018

STATUS

approved

editing

#26 by Joerg Arndt at Thu Dec 13 04:55:23 EST 2018

STATUS

reviewed

approved

#25 by Michel Marcus at Thu Dec 13 04:48:36 EST 2018

STATUS

proposed

reviewed

#24 by Bruno Berselli at Thu Dec 13 04:38:30 EST 2018

STATUS

editing

proposed

#23 by Bruno Berselli at Thu Dec 13 04:38:26 EST 2018

NAME

Numbers kn k such that the final digit of k^k is 6.

STATUS

proposed

editing

#22 by Bruno Berselli at Thu Dec 13 04:38:12 EST 2018

STATUS

editing

proposed

#21 by Bruno Berselli at Thu Dec 13 04:38:09 EST 2018

NAME

Numbers n kn such that the final digit of nk^n k is 6.

LINKS

<a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (1, 0, 0, 0, 0, 1, -1).

MATHEMATICA

LinearRecurrence[{1, 0, 0, 0, 0, 1, -1}, {4, 6, 8, 12, 14, 16, 24}, 59] (* Ray Chandler, Mar 08 2017 *)

KEYWORD

nonn,base,easy

STATUS

approved

editing