OFFSET
1,1
LINKS
Robert A. Beeler, A Note on the number of ways to compute a determinant using cofactor expansion, Bull. Inst. Combin. Appl., 63 (2011), 36-38. [ResearchGate link]
FORMULA
Equals 2^(e-2)*e^A306243.
Equals 2^(exp(1)-2)*A296301. - Vaclav Kotesovec, Jun 22 2023
EXAMPLE
3.009150722741487993563074737485316800510...
MATHEMATICA
2^(E-2)E^NSum[Log[n]/n!, {n, 2, Infinity}, WorkingPrecision -> 110, NSumTerms -> 100] // RealDigits[#, 10, 100] &//First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Stefano Spezia, Jun 21 2023
STATUS
approved