A115940 Pandigital (meaning every digit appears exactly once) triangular numbers.

1062489753, 1239845706, 1256984730, 1520843976, 1539264870, 1597283460, 1684930275, 1952843760, 1957346028, 1978236450, 2197480365, 2367098415, 2418079653, 2503948761, 2634980715, 2718609453, 2735891406, 2750483196

Offset

1,1

Comments

There are 82 such numbers, the largest being T(138959)=9654871320.

The sequence of pandigital binomial coefficients C(m,k) with k>1 contains 84 numbers, these 82 triangular terms of the form C(m,2) and only two other ones C(595,4) = 5169738420 and C(253,5) = 8301429675 (see link). - Bernard Schott, Apr 15 2022

Links

Zak Seidov, Table of n, a(n) for n = 1..82 (full sequence)

Fun With Num3ers, Pandigital Binomial coefficient | When C(n, k) is pandigital.

Example

T(46097)=1062489753.

Crossrefs

Cf. A050278, A115939.

Sequence in context: A051019 A051020 A221262 * A241812 A346652 A049446

Adjacent sequences: A115937 A115938 A115939 * A115941 A115942 A115943

Keyword

nonn,base,fini,full

Author

Giovanni Resta, Feb 06 2006

Status

approved