1,2

Interleaving of A001018 and A001018 without initial term 1.

Binomial transform is A083100. Second binomial transform is A164607.

a(n) = 2^(1/4*(6*n-3+3*(-1)^n)).

G.f.: x*(1+8*x)/(1-8*x^2).

(MAGMA) [ n le 2 select 7*n-6 else 8*Self(n-2): n in [1..26] ];

Cf. A001018 (powers of 8), A083100, A164607.

Sequence in context: A103744 A151782 A165829 this_sequence A038286 A165426 A019216

Adjacent sequences: A164680 A164681 A164682 this_sequence A164684 A164685 A164686

nonn

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 22 2009