A205028 - OEIS

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A205028

The index j<k such that n divides s(k)-s(j), where k is the least index (A205018) for which such j exists, and s(k)=k*(k+1).

2

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

(list; graph; refs; listen; history; text; internal format)

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 A205018.)

CROSSREFS

Cf. A205018, A204892.

Sequence in context: A047060 A050167 A047050 * A325055 A325526 A057820

Adjacent sequences: A205025 A205026 A205027 * A205029 A205030 A205031

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 22 2012

STATUS

approved