Numbers which can be expressed as the product of numbers made of only sixs.

Terms

a(0) =1a(1) =6a(2) =36a(3) =66a(4) =216a(5) =396a(6) =666a(7) =1296a(8) =2376a(9) =3996a(10) =4356a(11) =6666a(12) =7776a(13) =14256a(14) =23976a(15) =26136a(16) =39996a(17) =43956a(18) =46656a(19) =66666a(20) =85536a(21) =143856a(22) =156816a(23) =239976a(24) =263736a(25) =279936a(26) =287496a(27) =399996a(28) =439956a(29) =443556