[seqfan] Is this constant already in the OEIS?

[Felix Fröhlich]

Dear sequence fans

I went through some papers from Mathematics of Computation and found R. P.
Boas and V. C. Klema, A constant in the theory of trigonometric series,
Math. Comp. 18 (1964), 674-674,
http://dx.doi.org/10.1090/S0025-5718-1964-0176283-9. According to the
paper, the certain digits of the constant at the time of publication were
0.3048 (more digits may have been computed since then). Is that constant
already in the OEIS? I guess it may be A255504. Can someone confirm this?

Best regards
Felix Fröhlich