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1,4
G. C. Greubel, Table of n, a(n) for n = 1..2000
Equals Sum_{n>=0} 1/A165457(n). - Jaume Oliver Lafont, Oct 03 2009
Equals 3/A001113 and 3*A068985. - Michel Marcus, Sep 16 2016
1.103638323514...
RealDigits[3/E , 10, 50][[1]] (* G. C. Greubel, Sep 16 2016 *)
(PARI) 3/exp(1) \\ Michel Marcus, Sep 16 2016
Cf. A001113, A068985, A165457.
Sequence in context: A123146 A016661 A201143 * A090895 A264767 A065231
Adjacent sequences: A135000 A135001 A135002 * A135004 A135005 A135006
cons,nonn
Omar E. Pol, Nov 15 2007
Minor edits by Omar E. Pol, Oct 07 2009
approved