A341921 Number of simple strong triangulations of a fixed hexagon with n interior nodes.

1, 9, 50, 254, 1287, 6630, 34846, 186714, 1018095, 5638035, 31651992, 179850344, 1032901028, 5988670002, 35017696806, 206326044386, 1224068679855, 7307391855855, 43871253636210, 264755875041630, 1605357997312335, 9776732655285960, 59781214452500424, 366905787075963864

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..500

Prog

(PARI) R(25, 3) \\ R defined in A210664.

Crossrefs

Row m=3 of A210664.

Cf. A341918.

Sequence in context: A171480 A369906 A257589 * A231413 A007681 A279972

Adjacent sequences: A341918 A341919 A341920 * A341922 A341923 A341924

Keyword

nonn

Author

Andrew Howroyd, Feb 24 2021

Status

approved