OFFSET
1,4
LINKS
David A. Corneth, Table of n, a(n) for n = 1..10000
EXAMPLE
a(20) = 6 as the 20th number of the form 3^i * 4^j is 729 = 3^6 * 4^0 (See A025613). So the value of i in that factorization is the exponent of 3 which is 6. - David A. Corneth, Jan 28 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved