User:Francois Alcover

I was born in Paris and studied Computer Science. Currently obsessed with lattice animals.

[This contributor's father, Jean-François Alcover, is a distinguished contributor to and editor of the OEIS. - N. J. A. Sloane 02:40, 5 March 2017 (UTC)]

Sequences :

• A261834 Number of n-step adjacent expansions on the hexagonal (honeycomb) lattice. Holes allowed.
• A270310 Primes ending with the same decimal digit as the previous or next prime.
• A270311 Indices of primes ending with the same decimal digit as the previous or next prime.
• A272265 Number of n-step tri-directional self-avoiding walks on the hexagonal lattice.
• A272480 Number of n-step tri-directional self-avoiding walks on the hexagonal lattice, after first step.
• A272763 Number of n-step self-avoiding walks on the square lattice with diagonals allowed (Moore neighborhood). +0
• A283106 Number of distinct envelope areas of the polyominoes of order n.
• A283108 Number of fixed polyominoes minus number of free polyominoes for order n.
• A283109 Increase in the number of free polyominoes from order n to n+1.
• A283110 Increase in the number of fixed polyominoes from order n to order n+1.
• A322142 Powernacci numbers: a(n) = 2^(a(n-1) + a(n-2)) with a(0) = 0 and a(1) = 1.
• A325401 minflip(n) = min(n, r(n)) where r(n) is the binary reverse of n.
• A325402 maxflip(n) = max(n, r(n)) where r(n) is the binary reverse of n.
• A330079 Number of n-step self-avoiding walks starting at the origin that are restricted to the boundary walls of the first octant of the cubic lattice.