A193380 A192392(n)/n = largest m such that m*n is a concatenation of the numbers n(n-1)/2+1,...,n(n+1)/2.

1, 16, 218, 24277, 282624223, 35336530286, 4038946460332, 454417916411629, 50493713793377093, 5554535251494847465, 605967851146914507796, 65648063122810597558064, 7069922221437372952524460, 714212835424956578936007364364293

Offset: 1

Author

M. F. Hasler, Jul 24 2011

Keywords

• nonn
• base

Crossrefs

Cf. A076068 - A076073, A080479, A080480, A192392.

Programs

PARI

a(n) = A192392(n)/n  /* see there */

Formula

a(n) = A192392(n)/n.