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A374186
a(n) = ceiling(Integral_{t=0..n} floor(exp(t)) dt). The Waldvogel sequence.
1
0, 2, 6, 18, 52, 145, 400, 1093
OFFSET
0,2
COMMENTS
Named after Prof. Jörg Waldvogel (Swiss mathematician). For the variant using the floor of the approximation see A374185.
Is this, apart from a shift, the same as A245285?
LINKS
Pedro Gonnet, A Review of Error Estimation in Adaptive Quadrature, ACM Computing Surveys, 2012, arXiv:1003.4629 [cs.NA]. (p. 31, 32.)
CROSSREFS
Variant: A374185.
Sequence in context: A192237 A034525 A018249 * A245285 A128104 A318570
KEYWORD
nonn,more,hard
AUTHOR
Peter Luschny, Jul 07 2024
STATUS
approved