A343956 a(n) is the number of pentagonal faces of Johnson solid J_n.

0, 1, 0, 0, 1, 6, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 6, 0, 0, 1, 6, 0, 0, 0, 0, 2, 2, 7, 7, 12, 0, 0, 0, 2, 2, 7, 7, 12, 12, 0, 0, 2, 7, 12, 0, 0, 0, 2, 2, 0, 0, 0, 0, 11, 10, 10, 9, 2, 3, 3, 0, 0, 0, 1, 2, 2, 3, 12, 12, 12, 12, 11, 11, 11, 11, 10, 10, 10, 9, 0, 0, 0, 0, 0, 0, 0, 4, 3

Offset: 1

Author

Felix Fröhlich, May 05 2021

Keywords

• nonn
• fini
• full

Links

• Eric Weisstein's World of Mathematics, Johnson Solid.
• Wikipedia, List of Johnson solids.

Crossrefs

Cf. A242731, A343954, A343955, A343957, A343958, A343959.

Formula

a(n) < A242731(n).

Extensions

a(82)-a(92) from Pontus von Brömssen, May 27 2025