1,2
Table of n, a(n) for n=1..27.
a(n) = A054433_as_sum(2*n)
with(combinat, fibonacci); # one_or_zero given at A054431.
A054433_as_sum := proc(n) local i; RETURN(add((one_or_zero(igcd(n, i))*fibonacci(i+1)), i=1..(n-1))); end;
Cf. A054432, A048757, A051258, A063683.
Sequence in context: A320920 A048757 A173659 * A219769 A096531 A149121
Adjacent sequences: A054430 A054431 A054432 * A054434 A054435 A054436
nonn
Antti Karttunen
approved