login
A122503
a(n) = 22*a(n - 2) + 54*a(n - 3) + 38*a(n - 4).
0
1, 1, 1, 1, 114, 114, 2600, 8702, 67688, 336176, 2057844, 11381700, 65998216, 374295664, 2144770624, 12230912872, 69904851792, 399120932112, 2279877318224, 13020297192368, 74366215703072, 424726508836448
OFFSET
1,5
REFERENCES
R. G. Newton, Scattering Theory of Waves and Particles, McGraw Hill, New York, 1966, Page 557ff.
FORMULA
G.f.: x*(75*x^3+21*x^2-x-1)/(38*x^4+54*x^3+22*x^2-1). [Colin Barker, Nov 02 2012]
MATHEMATICA
LinearRecurrence[{0, 22, 54, 38}, {1, 1, 1, 1}, 30] (* Harvey P. Dale, Jul 05 2017 *)
CROSSREFS
Sequence in context: A180052 A106748 A220983 * A076150 A294309 A138693
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Sep 15 2006
EXTENSIONS
Edited by N. J. A. Sloane, Sep 17 2006
STATUS
approved