A260055 Composites whose prime factorization in base 12 is an anagram of the number in base 12.

169, 185, 219, 2165, 2402, 3981, 4205, 10031, 21349, 21907, 22049, 24199, 26919, 27746, 28802, 29767, 29919, 31107, 46749, 71375, 251521, 252257, 252361, 259565, 275237, 280587, 292159, 293011, 301163, 303161, 305765

Offset: 1

Author

Stephen Tucker, Jul 14 2015

Keywords

• base
• easy
• nonn

Examples

			169 = 13^2. In base 12, 121 = 11^2.
		

Links

• Giovanni Resta, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A260046, A260047, A260048, A260049, A260050, A260051, A260052, A260053, A025283, A260054.

Programs

PARI

isok(n, b) = {f = factor(n); v = []; for (i=1, #f~, v = concat(v, digits(f[i,1], b)); if (f[i,2]!= 1, v = concat(v, digits(f[i,2], b)));); vecsort(v) == vecsort(digits(n, b));}
lista(nn, b=12) = forcomposite(n=1, nn, if (isok(n,b), print1(n, ", "))); \\ Michel Marcus, Jul 14 2015