1,1

Table of n, a(n) for n=1..18.

a(4)=203 because 203 = 7*29, 209 = 11*19, 215 = 5*43, 221 = 13*17.

Cf. A082919, A092129.

Sequence in context: A173317 A059811 A202409 * A198025 A205549 A120395

Adjacent sequences: A091013 A091014 A091015 * A091017 A091018 A091019

nonn,fini

Don Reble, Feb 25 2004

a(8) and a(9) corrected and a(18) from Donovan Johnson, Oct 01 2010

approved