OFFSET
1,5
FORMULA
a(n) = A037916(2*n-1).
EXAMPLE
a(8) = 11, because 2*8 - 1 = 15 = 3^1 * 5^1 and the concatenation of the exponents of the prime factorization is 11.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jean-Marc Rebert, Aug 02 2024
STATUS
approved