A381814 Size of the largest component of the blet graph for n coins.

2, 5, 20, 8, 56, 56, 74, 180, 660, 220, 2288, 2002, 2942, 7280, 24752, 8568, 93024, 77520, 120920, 298452, 1009470, 346104, 3845600, 3289000, 5067974, 12432420, 42921450, 14307150, 161280600, 140244000, 215188426, 524512560, 1835793960

Offset: 3

Author

Pontus von Brömssen, Mar 08 2025

Keywords

• nonn
• more

Comments

See A381813 for the definition of the blet graph.

Examples

			For n = 4, the blet graph has 2 components of maximum size a(4) = 5: {TTTH, THTT, THHH, HTHT, HHTH} and {TTHT, THTH, HTTT, HTHH, HHHT}.
		

Links

• Michael S. Branicky, Python program for OEIS A381813 and A381814

Crossrefs

Cf. A075273, A381812, A381813 (number of components of size at least 2).

Programs

Python

# see linked program

Formula

a(2*n) >= A075273(n) (the size of the component containing the vertex (HT)^n).

Extensions

a(24)-a(28) from Michael S. Branicky, Mar 08 2025

a(29)-a(30) from Michael S. Branicky, Mar 12 2025

a(31)-a(35) from Bert Dobbelaere, Mar 16 2025