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

1,1

Links

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

Example

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

Prog

(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

Crossrefs

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

Sequence in context: A240069 A184035 A044869 * A235718 A239724 A038512

Adjacent sequences: A260052 A260053 A260054 * A260056 A260057 A260058

Keyword

base,easy,nonn

Author

Stephen Tucker, Jul 14 2015

Status

approved