A248679 Decimal expansion of r = sum_{n >= 0} floor(3n/2)!/(2n)!.

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

Offset

1,2

Links

Clark Kimberling, Table of n, a(n) for n = 1..1000

Example

r = 1.80340299916782386944503048046786948345317...

Maple

evalf(sum(floor(3n/2)!/(2n)!, n=0..infinity), 120); # Vaclav Kotesovec, Oct 17 2014

Mathematica

x = N[Sum[Floor[3 n/2]!/(2 n)!, {n, 0, 200}], 120]
RealDigits[x][[1]]  (* A248679 *)

Crossrefs

Cf. A248680, A248681.

Sequence in context: A251866 A300713 A020837 * A175574 A195342 A307184

Adjacent sequences: A248676 A248677 A248678 * A248680 A248681 A248682

Keyword

nonn,easy,cons

Author

Clark Kimberling, Oct 11 2014

Status

approved