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A386710 Decimal expansion of BesselI(2, 2 * sqrt(2)).

%I A386710 #37 Sep 02 2025 11:00:55
%S A386710 1,8,5,7,5,1,7,7,8,0,2,2,9,2,1,9,1,0,8,7,7,0,5,9,8,1,8,7,6,5,3,1,3,7,
%T A386710 1,5,0,1,3,9,0,4,9,0,9,1,1,3,5,7,0,5,0,9,1,7,2,0,6,3,4,6,3,6,1,1,2,0,
%U A386710 8,2,2,2,1,6,4,7,0,8,7,1,8,0,7,3,4,5,8,2,7,2,2,8,3,0,6,6,5,7,7,3,9,3,8,5,8
%N A386710 Decimal expansion of BesselI(2, 2 * sqrt(2)).
%H A386710 Kelvin Voskuijl, <a href="/A386710/b386710.txt">Table of n, a(n) for n = 1..20000</a>
%F A386710 Equals Sum_{k >= 1}  2^k/((k-1)!*(k+1)!).
%e A386710 1.8575177802292191087705981876531371501390490911357...
%t A386710 RealDigits[BesselI[2, 2 * Sqrt[2]],10,100][[1]] (* _Stefano Spezia_, Aug 02 2025 *)
%o A386710 (PARI) besseli(2, 2*sqrt(2)) \\ _Amiram Eldar_, Aug 02 2025
%Y A386710 Cf. A386927 (continued fraction).
%Y A386710 Cf. A096789 (for factorial squared).
%Y A386710 Cf. A006472 (triangular polygorials).
%K A386710 nonn,cons,easy,changed
%O A386710 1,2
%A A386710 _Kelvin Voskuijl_, Jul 30 2025