A390994 Number of one-sided polyaboloes (or polytans) with n cells, where the orientation of two triangles sharing a hypotenuse (making up a square) matters.

1, 4, 8, 35, 114, 483, 1916, 8166, 34488, 149166, 647564, 2841223, 12531926, 55622495

Offset

1,2

Comments

See A390993 for details.

Links

Table of n, a(n) for n=1..14.

Formula

a(n) = A390995(n)/4 if n is odd.

Crossrefs

Cf. A151519, A390993 (free), A390995 (fixed), A390997, A391000.

Sequence in context: A218628 A149108 A149109 * A266676 A046056 A158863

Adjacent sequences: A390991 A390992 A390993 * A390995 A390996 A390997

Keyword

nonn,more

Author

Pontus von Brömssen, Nov 27 2025

Extensions

a(14) from John Mason, Nov 29 2025

Status

approved