A205003 The index j<k such that n divides s(k)-s(j), where k is the least index (A205002) for which such j exists, and s(k)=k(k+1)/2.

1, 1, 2, 3, 1, 2, 2, 7, 1, 1, 4, 2, 5, 1, 3, 15, 7, 2, 8, 1, 5, 3, 10, 6, 2, 4, 1, 4, 13, 3, 14, 31, 2, 6, 1, 3, 17, 7, 3, 5, 19, 2, 20, 1, 4, 9, 22, 14, 3, 7, 5, 2, 25, 1, 8, 4, 6, 12, 28, 3

Offset

1,3

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: A351441 A254761 A227552 * A159956 A053839 A047896

Adjacent sequences: A205000 A205001 A205002 * A205004 A205005 A205006

Keyword

nonn

Author

Clark Kimberling, Jan 21 2012

Status

approved