A026883 T(2n,n+1), T given by A026769.

1, 4, 16, 66, 281, 1232, 5548, 25598, 120724, 580658, 2842222, 14129842, 71212849, 363242996, 1872444764, 9741516322, 51092414488, 269881127838, 1434527328782, 7667466737670, 41184478999300, 222189902624502, 1203447917249894

Offset

1,2

Links

Table of n, a(n) for n=1..23.

Crossrefs

Sequence in context: A099782 A109034 A110276 * A349730 A151242 A218645

Adjacent sequences: A026880 A026881 A026882 * A026884 A026885 A026886

Keyword

nonn

Author

Clark Kimberling

Status

approved