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

1,2

Links

Table of n, a(n) for n=1..14.

Formula

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

Prog

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

Crossrefs

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

Sequence in context: A239042 A186841 A130606 * A076073 A092657 A078266

Adjacent sequences: A193377 A193378 A193379 * A193381 A193382 A193383

Keyword

nonn,base

Author

M. F. Hasler, Jul 24 2011

Status

approved