A261879 Decimal expansion of BesselI(3,2).

2, 1, 2, 7, 3, 9, 9, 5, 9, 2, 3, 9, 8, 5, 2, 6, 5, 5, 2, 7, 2, 3, 5, 4, 3, 9, 3, 3, 7, 5, 9, 3, 2, 0, 3, 7, 2, 9, 1, 7, 5, 2, 2, 7, 2, 9, 1, 5, 6, 9, 1, 8, 3, 3, 2, 5, 5, 1, 8, 4, 4, 5, 0, 4, 9, 7, 0, 2, 4, 4, 2, 6, 1, 4, 0, 7, 3, 0, 8, 6, 9, 8, 8, 9, 3, 3, 2, 2, 6, 5, 6, 6, 9, 7, 1, 4, 9, 7, 7, 7, 4, 4, 0, 7, 8

Offset: 0

Author

Jean-François Alcover, Nov 19 2015

Keywords

• nonn
• cons
• easy

Examples

			0.212739959239852655272354393375932037291752272915691833255184450497...
		

Links

• G. C. Greubel, Table of n, a(n) for n = 0..2500
• Eric Weisstein's MathWorld, Modified Bessel Function of the First Kind

Crossrefs

Cf. A070910 (BesselI(0,2)), A096789 (BesselI(1,2)), A229020 (BesselI(2,2)).

Programs

Mathematica

RealDigits[BesselI[3, 2], 10, 105][[1]]

PARI

besseli(3,2) \\ Altug Alkan, Nov 19 2015

Formula

Sum_{k>=1} 1/((k - 2)!*(k + 1)!).

Also S(2) - S(1), using Peter Bala's notation in A229020.