A056952 - OEIS

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A056952

Numerators of continued fraction for alternating factorial.

3

0, 1, 1, 2, 4, 8, 20, 44, 124, 300, 920, 2420, 7940, 22460, 78040, 235260, 859580, 2741660, 10477880, 35152820, 139931620, 491459820, 2030707640, 7436765660, 31805257340, 121046445260, 534514790680, 2108118579060, 9591325648580

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OFFSET

0,4

LINKS

Table of n, a(n) for n=0..28.

FORMULA

a(0)=0; a(1)=1; a(n) = a(n-1) + (n/2)*a(n-2).

a(2n) = A002793(n); a(2n-1) = A002793(n) - n * A002793(n-1). - Max Alekseyev, Jul 07 2010

CROSSREFS

Cf. A002793, A056922 (denominators).

Sequence in context: A078006 A288476 A338197 * A369496 A225585 A121703

Adjacent sequences: A056949 A056950 A056951 * A056953 A056954 A056955

KEYWORD

nonn,frac

AUTHOR

Aleksandar Petojevic, Sep 05 2000

EXTENSIONS

More terms from James A. Sellers, Sep 07 2000

STATUS

approved