1,1
Shiva Samieinia, Digital straight line segments and curves. Licentiate Thesis. Stockholm University, Department of Mathematics, Report 2007:6.
a(2k) = a(2k-1) + a(2k-2) + a(2k-3) and a(2k-1) = a(2k-2) + 2a(2k-3).
The asymptotic behavior is a(2k) = t(2k) sqrt(3)(2 + sqrt(3))^k, a(2k-1) = t(2k-1)(2 + sqrt(3))^k where t(n) tends to 1/2 + sqrt(3)/6.
Cf. A001045, A000213, A131935.
Sequence in context: A078722 A089098 A129384 * A045691 A045961 A117272
Adjacent sequences: A131884 A131885 A131886 * A131888 A131889 A131890
nonn
Shiva Samieinia (shiva(AT)math.su.se), Oct 05 2007, Oct 09 2007
