A378337 Number of connected sensed planar maps with an external face and n internal triangular faces.

1, 2, 6, 32, 155, 1043, 7083, 51983, 393064, 3069809, 24522342, 199837021, 1655355627, 13907476161, 118275808160, 1016657106858, 8821284816805, 77181267608093, 680346219098844, 6037537131435871, 53904120217352519, 483921982054548241, 4366269495618350828, 39577142154691122910

Offset

1,2

Links

Table of n, a(n) for n=1..24.

Prog

(PARI) A378337seq(20) \\ See PARI link in A378340 for program code.

Crossrefs

Column sums of A378336.

Cf. A378335, A378338, A378341.

Sequence in context: A121071 A092199 A108485 * A371482 A018940 A271958

Adjacent sequences: A378334 A378335 A378336 * A378338 A378339 A378340

Keyword

nonn,new

Author

Andrew Howroyd, Nov 23 2024

Status

approved