A343955 a(n) is the number of square faces of Johnson solid J_n.

1, 0, 3, 5, 5, 0, 3, 5, 5, 1, 0, 0, 0, 3, 4, 5, 0, 9, 13, 15, 10, 3, 5, 5, 0, 4, 6, 10, 10, 10, 10, 5, 5, 0, 12, 12, 18, 20, 20, 15, 15, 10, 10, 6, 10, 10, 5, 0, 2, 1, 0, 4, 3, 5, 4, 4, 3, 0, 0, 0, 0, 0, 0, 0, 3, 5, 10, 5, 10, 10, 15, 30, 30, 30, 30, 25, 25, 25, 25, 20, 20, 20, 15, 0, 2, 2, 1, 2, 3, 4, 2, 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, A343956, A343957, A343958, A343959.

Formula

a(n) < A242731(n).

Extensions

a(78)-a(92) from Pontus von Brömssen, May 27 2025