OFFSET
0,3
COMMENTS
Spironacci-polynomials evaluated at X=2 over the field GF(2).
This is otherwise computed like A078510, which starts with a(0)=0 placed in the center of spiral (in square grid), followed by a(1) = 1, after which each term is a sum of two previous terms that are nearest when terms are arranged in a spiral, that is terms a(n-1) and a(A265409(n)), except here we first multiply the term a(n-1) by 2, and use carryless XOR (A003987) instead of normal addition.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..256
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 13 2015
STATUS
approved