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A246662 a(n) = 2*(K(n,2)*I(4,2) - (-1)^n*I(n,2)*K(4,2)) where I(n,x) and K(n,x) are Bessel functions. 0
-10, 7, -3, 1, 0, 1, 5, 31, 222, 1807, 16485, 166657, 1849712, 22363201, 292571325, 4118361751, 62067997590, 997206323191, 17014575491837, 307259565176257, 5854946313840720, 117406185841990657, 2471384848995644517, 54487872863746170031, 1255692460715157555230 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..24.

FORMULA

a(n) = a(-n).

a(n+4) = A058309(n).

MAPLE

a := n -> 2*(BesselK(n, 2)*BesselI(4, 2)-(-1)^n*BesselI(n, 2)* BesselK(4, 2)); seq(round(evalf(a(n), 99)), n=0..24);

CROSSREFS

Cf. A058309.

Sequence in context: A185221 A248153 A079166 * A246651 A089245 A098592

Adjacent sequences:  A246659 A246660 A246661 * A246663 A246664 A246665

KEYWORD

sign

AUTHOR

Peter Luschny, Sep 12 2014

STATUS

approved

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Last modified October 16 20:23 EDT 2019. Contains 328103 sequences. (Running on oeis4.)