OFFSET
0,2
LINKS
Robert Israel, Table of n, a(n) for n = 0..4424
FORMULA
a(n) = ceiling(8^(n/4)). - Michel Marcus, Dec 28 2020
MAPLE
seq(ceil(8^(n/4)), n=0..40); # Robert Israel, Dec 28 2020
PROG
(PARI) a(n) = n*=3; if(n%2, sqrtnint(1<<n, 4)+1, n%4, sqrtint(1<<(n/2))+1, 1<<(n/4)); \\ Kevin Ryde, Dec 29 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved