The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A191690 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A191690

a(n) = n^n-n^(n-1)-n^(n-2)-...-n^2-n-1.
(history; published version)

#26 by N. J. A. Sloane at Wed Apr 22 11:50:33 EDT 2015

STATUS

proposed

approved

#25 by Danny Rorabaugh at Mon Apr 20 17:02:47 EDT 2015

STATUS

editing

proposed

#24 by Danny Rorabaugh at Mon Apr 20 17:02:17 EDT 2015

LINKS

Danny Rorabaugh, <a href="/A191690/b191690.txt">Table of n, a(n) for n = 1..350</a>

#23 by Danny Rorabaugh at Mon Apr 20 16:57:23 EDT 2015

PROG

(Sage) [n^n - sum([n^k for k in range(n)]) for n in range(1, 19)] # Danny Rorabaugh, Apr 20 2015

#22 by Danny Rorabaugh at Mon Apr 20 16:55:12 EDT 2015

FORMULA

a(n) = n^n - A023037(n). - Danny Rorabaugh, Apr 20 2015

STATUS

proposed

editing

#21 by Michel Marcus at Thu Apr 16 12:17:31 EDT 2015

STATUS

editing

proposed

#20 by Michel Marcus at Thu Apr 16 12:16:57 EDT 2015

PROG

(PARI) a(n) = n^n - sum(k=0, n-1, n^k); \\ Michel Marcus, Apr 16 2015

#19 by Michel Marcus at Thu Apr 16 12:14:33 EDT 2015

NAME

a(n) = n^n-n^(n-1)-n^(n-2)-...-n^2-n-1.

FORMULA

a(n) = A117667(n)-1. - Robert G. Wilson v, Apr 16 2015

STATUS

proposed

editing

#18 by Robert G. Wilson v at Thu Apr 16 10:48:13 EDT 2015

STATUS

editing

proposed

#17 by Robert G. Wilson v at Thu Apr 16 10:47:54 EDT 2015

EXAMPLE

a(1)=0 (=1^1-1), a(2)=1 (=2^2-2-1), a(23)=14 (=3^3-3^2-3-1), a(34)=171 (=4^4-4^3-4^2-4-1).

STATUS

reviewed

editing

Discussion

Thu Apr 16

10:48

Robert G. Wilson v: I also fixed the index in the examples.