A111482 Least triangular number whose digits include a permutation of {0,1,...,n}.

0, 10, 120, 12403, 12403, 231540, 1053426, 10623745, 120784653, 1062489753

Offset

0,2

Comments

Note that this is not "Least triangular number whose digits ARE a permutation of {0,1,...,n}" because there is no such value for n = 3, for instance 3321 = T(81) has no zero. Are there equivalents in all integer bases?

Links

Table of n, a(n) for n=0..9.

Example

a(0) = 0 = T(0).
a(1) = 10 = T(4).
a(2) = 120 = T(15).
a(3) = 12403 = T(157).
a(4) = 12403 = T(157).
a(5) = 231540 = T(680).
a(6) = 1053426 = T(1451).
a(7) = 10623745 = T(4609).
a(8) = 120784653 = T(15542).
a(9) = 1062489753 = T(46097).

Crossrefs

Cf. A000217.

Sequence in context: A069671 A138445 A138496 * A095870 A178928 A111695

Adjacent sequences: A111479 A111480 A111481 * A111483 A111484 A111485

Keyword

base,easy,fini,full,nonn

Author

Jonathan Vos Post, Nov 15 2005

Extensions

Extended by Ray Chandler, Nov 19 2005

Status

approved