A091796 Smallest k such that for 0 <= i < n, n*(n+1)/2-i divides k+i.

0, 3, 54, 2510, 60045, 1627899, 124324172, 1694579004, 446626219995, 73706596563545, 177223661334654, 171986625946535322, 3290057629552053269, 551042196782556679095, 71028805196838414285240

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Formula

a(n) = A061431(n)-n*(n+1)/2.

Example

a(4) = 2510 because 7 divides 2513, 8 divides 2512, 9 divides
2511 and 10 divides 2510.

Crossrefs

Cf. A091795, A091797.

Sequence in context: A157550 A224368 A091826 * A171213 A006025 A049414

Adjacent sequences: A091793 A091794 A091795 * A091797 A091798 A091799

Keyword

nonn,easy

Author

Amarnath Murthy, Feb 18 2004

Extensions

Edited and extended by David Wasserman, Dec 27 2005

Status

approved