A165204 Hankel transform of A165203.

1, -5, -21, -21, 89, 377, 377, -1597, -6765, -6765, 28657, 121393, 121393, -514229, -2178309, -2178309, 9227465, 39088169, 39088169, -165580141, -701408733, -701408733, 2971215073, 12586269025, 12586269025, -53316291173, -225851433717, -225851433717

Offset

0,2

Comments

Entries are based on F(3n+2).

Links

Table of n, a(n) for n=0..27.

Formula

Conjectures from Colin Barker, Feb 10 2018: (Start)

G.f.: (1 - 8*x + 2*x^2 - x^3) / (1 - 3*x + 8*x^2 - 3*x^3 + x^4).

a(n) = 3*a(n-1) - 8*a(n-2) + 3*a(n-3) - a(n-4) for n>3.

(End)

Crossrefs

Sequence in context: A204914 A355036 A263130 * A043053 A004163 A350328

Adjacent sequences: A165201 A165202 A165203 * A165205 A165206 A165207

Keyword

sign

Author

Paul Barry, Sep 07 2009

Extensions

More terms added, and a(19) corrected by Colin Barker, Feb 10 2018

Status

approved