A205004 Least k(k+1)/2 such that n divides k(k+1)/2-j(j+1)/2 for some j<k.

3, 3, 6, 10, 6, 15, 10, 36, 10, 21, 21, 15, 28, 15, 21, 136, 45, 21, 55, 21, 36, 28, 78, 45, 28, 36, 28, 66, 120, 36, 136, 528, 36, 55, 36, 78, 190, 66, 45, 55, 231, 45, 253, 45, 55, 91, 300, 153, 55, 78, 66, 55, 378, 55, 91, 66, 78, 136, 465, 66

Offset

1,1

Comments

For a guide to related sequences, see A204892.

Links

Table of n, a(n) for n=1..60.

Mathematica

(See the program at A205002.)

Crossrefs

Cf. A204892, A205002.

Sequence in context: A185957 A124326 A202970 * A236345 A212991 A226642

Adjacent sequences: A205001 A205002 A205003 * A205005 A205006 A205007

Keyword

nonn

Author

Clark Kimberling, Jan 21 2012

Status

approved