A343954 a(n) is the number of triangular faces of Johnson solid J_n.
4, 5, 4, 4, 5, 10, 4, 4, 5, 12, 15, 6, 10, 6, 8, 10, 16, 4, 4, 5, 10, 16, 20, 25, 30, 4, 8, 8, 8, 10, 10, 15, 15, 20, 8, 8, 8, 10, 10, 15, 15, 20, 20, 20, 24, 30, 35, 40, 6, 10, 14, 4, 8, 4, 8, 8, 12, 5, 10, 10, 15, 10, 5, 7, 8, 12, 16, 25, 30, 30, 35, 20, 20, 20, 20, 15, 15, 15, 15, 10, 10, 10, 5, 12, 24, 12, 16, 16, 18, 20, 8, 13
Offset: 1
Links
- Eric Weisstein's World of Mathematics, Johnson Solid.
- Wikipedia, List of Johnson solids.
Formula
a(n) <= A242731(n).
Extensions
a(74)-a(92) from Pontus von Brömssen, May 27 2025