A343959 a(n) is the number of decagonal faces of Johnson solid J_n.

0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 10, 10, 9, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

1,68

Links

Table of n, a(n) for n=1..92.

Eric Weisstein's World of Mathematics, Johnson Solid.

Wikipedia, List of Johnson solids.

Formula

a(n) < A242731(n).

Mathematica

Array[Count[Map[Length, PolyhedronData["J" <> ToString[#], "FaceIndices"]], 10] &, 92] (* Paolo Xausa, Apr 16 2026 *)

Crossrefs

Cf. A242731, A343954, A343955, A343956, A343957, A343958.

Essentially column k = 10 of A394912.

Sequence in context: A004452 A291467 A112952 * A070561 A059941 A086100

Adjacent sequences: A343956 A343957 A343958 * A343960 A343961 A343962

Keyword

nonn,fini,full

Author

Felix Fröhlich, May 05 2021

Extensions

a(87)-a(92) from Pontus von Brömssen, May 27 2025

Status

approved