OFFSET
0,3
COMMENTS
Also: the nonpositive integers, listed with offset = 0 and in decreasing order.
An involution: the function is its own inverse, A001489 o A001489 = A001477, the identity function on N = {0, 1, 2, 3, ...}. - M. F. Hasler, Jan 18 2015
LINKS
David Wasserman, Table of n, a(n) for n = 0..1000
D. Dumont and J. Zeng, Polynomes d'Euler et les fractions continues de Stieltjes-Rogers, Ramanujan J. 2 (1998) 3, 387-410.
Tanya Khovanova, Recursive Sequences
A. Randrianarivony and J. Zeng, Une famille de polynomes qui interpole plusieurs suites classiques de nombres, Adv. Appl. Math. 17 (1996), 1-26.
J. Zeng, Sur quelques propriétés de symétrie des nombres de Genocchi, Discr. Math. 153 (1996) 319-333.
Index entries for linear recurrences with constant coefficients, signature (2,-1).
FORMULA
EXAMPLE
G.f. = -x - 2*x^2 - 3*x^3 - 4*x^4 - 5*x^5 - 6*x^6 - 7*x^7 - ... - Michael Somos, Aug 04 2018
MAPLE
A001489 := n->-n;
[ seq(-n, n=0..100) ];
MATHEMATICA
Table[ -n, {n, 0, 50}] (* Stefan Steinerberger, Apr 01 2006 *)
PROG
(PARI) a(n)=-n \\ Charles R Greathouse IV, Jun 04 2013
(Python)
def A001489(n): return -n # Chai Wah Wu, Nov 14 2022
CROSSREFS
KEYWORD
core,sign,easy
AUTHOR
EXTENSIONS
Edited by M. F. Hasler, Jan 18 2015
STATUS
approved