A026863 T(2n,n+3), T given by A026747.

1, 9, 56, 301, 1504, 7217, 33821, 156274, 716116, 3266558, 14868789, 67649170, 307997855, 1404343584, 6416130302, 29383457373, 134915391509, 621163581667, 2867888163907, 13278007815855, 61645847283931, 286977785803129

Offset

3,2

Links

Table of n, a(n) for n=3..24.

Crossrefs

Sequence in context: A026846 A026849 A026879 * A026890 A163889 A296817

Adjacent sequences: A026860 A026861 A026862 * A026864 A026865 A026866

Keyword

nonn

Author

Clark Kimberling

Status

approved