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A187103
Maximum order of an explicit Runge-Kutta method with n function evaluations in each step.
2
1, 2, 3, 4, 4, 5, 6, 6, 7, 7, 8
OFFSET
1,2
COMMENTS
a(n) <= n-3 for n >= 10 (Butcher 1985).
Observation: first 10 terms coincide with A303735. - Omar E. Pol, Oct 04 2018
The preceding observation (by Omar E. Pol) holds also for the 11th term. - Pontus von Brömssen, Apr 05 2023
FORMULA
a(n) = max{k; A187102(k)<=n}.
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
STATUS
approved