A385453 Decimal expansion of 6*Sum_{k>=0} (-1)^k/(k! (k + 3)! 2^k).

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

Offset: 0

Author

Artur Jasinski, Jun 29 2025

Keywords

• cons
• nonn

Examples

			0.881079450691092189890537005867857949397...
		

Links

• Michael I. Shamos, A catalog of the real numbers, (2007), p. 614.

Crossrefs

Cf. A334383.

Programs

Mathematica

RealDigits[Hypergeometric0F1[4, -1/2], 10, 105][[1]]

Formula

Equals Hypergeometric0F1(4, -1/2).

Equals 12 * sqrt(2) * BesselJ(3, sqrt(2)).