A205395 The index j<k such that n divides s(k)-s(j) for some j, where s(j)=ceiling(j^2/2), and k is the least index for which such an index j exists.

1, 1, 2, 1, 4, 2, 1, 3, 3, 4, 2, 1, 3, 6, 2, 2, 1, 3, 5, 3, 4, 10, 2, 1, 7, 12, 3, 5, 8, 2, 1, 6, 4, 16, 2, 3, 5, 18, 2, 1, 12, 4, 6, 9, 3, 22, 7, 2, 1, 5, 14, 11, 4, 6, 6, 3, 9, 28, 2, 1, 19, 30, 10, 4, 8, 8, 3, 15, 20, 2, 1, 5, 7, 36, 10, 17, 4, 10, 3, 3

Offset

1,3

Comments

For a guide to related sequences, see A204892.

Links

Table of n, a(n) for n=1..80.

Mathematica

(See the program at A205394.)

Crossrefs

Cf. A205394, A204892.

Sequence in context: A088423 A006839 A268267 * A367647 A243070 A243060

Adjacent sequences: A205392 A205393 A205394 * A205396 A205397 A205398

Keyword

nonn

Author

Clark Kimberling, Jan 27 2012

Status

approved