OFFSET
0,4
REFERENCES
J. M. Gandhi, On logarithmic numbers, Math. Student, 31 (1963), 73-83.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
J. M. Gandhi, On logarithmic numbers, Math. Student, 31 (1963), 73-83. [Annotated scanned copy]
FORMULA
E.g.f.: F(x)/exp(x)/x where F(x) is o.g.f. for A000005(). - Vladeta Jovovic, Feb 09 2003
MAPLE
A002749 := proc(r)
add(A260324(n, r), n=1..r+1) ;
end proc:
seq(A002749(r), r=0..25) ; # R. J. Mathar, Jul 24 2015
MATHEMATICA
m = 22;
F[x_] = Sum[DivisorSigma[0, n] x^n , {n, 1, m}];
CoefficientList[F[x]/(x E^x) + O[x]^m, x] Range[0, m-1]! (* Jean-François Alcover, Mar 30 2020 *)
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
Corrected and extended by Jeffrey Shallit
STATUS
approved