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A023444 a(n) = n-2. 9
-2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

The months September to December (9 to 12) are sometimes found in old written French to be abbreviated as 7bre, 8bre, 9bre and 10bre. See Jeff Steiner link. - Michel Marcus, Sep 26 2017

LINKS

Table of n, a(n) for n=0..57.

Tanya Khovanova, Recursive Sequences

Jeff Steiner's Americans in France, Abbreviated Months (7bre, 8bre, 9bre, 10bre and Xbre)

Robert G. Wilson v, American English names for the numbers from 0 to 100999 without spaces or hyphens.

Index entries for linear recurrences with constant coefficients, signature (2,-1).

FORMULA

G.f.: -(2-3*x)/(1-x)^2. - Bruno Berselli, Sep 02 2011

a(n) = 2 a(n-1) - a(n-2). a(n) = -A022958(n). - M. F. Hasler, Apr 18 2015

PROG

(PARI) a(n)=n-2

CROSSREFS

Cf. A256958, A001057, A000027, A001477, A023443, A023445, ..., A023482, A022958, ..., A022996.

Sequence in context: A065358 A062329 A022958 * A248157 A290428 A136868

Adjacent sequences:  A023441 A023442 A023443 * A023445 A023446 A023447

KEYWORD

sign,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 21 04:02 EDT 2017. Contains 293679 sequences.