A395759 Decimal expansion of the sum of the reciprocals of 12-gonal polygorials A276482.

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

Offset

1,1

Links

Kelvin Voskuijl, Table of n, a(n) for n = 1..10000

Formula

Equals BesselI(-4/5,2/sqrt(5))*Gamma(1/5)/5^(2/5).

Example

2.08589842113091...

Mathematica

RealDigits[BesselI[-4/5, 2/Sqrt[5]]*(Gamma[1/5]/5^(2/5)), 10, 120][[1]]

Prog

(PARI) besseli(-4/5, 2/sqrt(5))*gamma(1/5)/5^(2/5)

Crossrefs

Cf. A001113 (of factorials), A070910 (of factorials squared).

Cf. A395536-A395537, A395755-A395759 (pentagonal to 12-gonal).

Cf. A276482.

Sequence in context: A377567 A334071 A243406 * A293934 A356651 A316133

Adjacent sequences: A395756 A395757 A395758 * A395760 A395761 A395762

Keyword

nonn,cons

Author

Kelvin Voskuijl, May 17 2026

Status

approved