This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A321197 a(n) gives the A-sequence for the Riordan matrix (1/(1 + x^2 - x^3), x/(1 + x^2 - x^3)) from A321196. 1
 1, 0, -1, 1, -1, 3, -4, 10, -20, 42, -98, 210, -492, 1122, -2607, 6149, -14443, 34463, -82238, 197574, -476918, 1154402, -2807516, 6845016, -16743674, 41067512, -100967539, 248843095, -614546545, 1520779665 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS See the recurrence formula for A321196 from the A- and Z-sequences. LINKS FORMULA a(n) = [t^n] (1/f(t)), where f(t) = F^{[-1]}(t)/t, with the compositional inverse F^{[-1]}(t) of F(x) = 1/(1 + x^2 - x^3). The expansion of f is given by (-1)^n*A001005(n), for n >= 0. CROSSREFS Cf. A001005, A321196. Sequence in context: A306334 A036649 A255539 * A109887 A200981 A266729 Adjacent sequences:  A321194 A321195 A321196 * A321198 A321199 A321200 KEYWORD sign AUTHOR Wolfdieter Lang, Oct 30 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 18 20:13 EDT 2019. Contains 328197 sequences. (Running on oeis4.)