1,2

See A037278(n) = concatenation of divisors of n. See A176556 for corresponding values of concatenations. Complement of A176553(n) for n >= 2.

Table of n, a(n) for n=1..71.

a(6) = 8: divisors of 8 are 1,2,4,8 and their concatenation 1248 is nonprime.

Sequence in context: A035500 A080653 A115836 * A284895 A285354 A050505

Adjacent sequences: A176551 A176552 A176553 * A176555 A176556 A176557

nonn,base

Jaroslav Krizek, Apr 20 2010

Edited and extended by Charles R Greathouse IV, Apr 30 2010

approved