A081513 a(2)=0; for n != 2, let m = A081512(n), then a(n) = value of d_n in the lexicographically earliest set of n distinct divisors d_1, ..., d_n of m with d_1 + ... + d_n = m.

1, 0, 3, 6, 12, 8, 24, 20, 28, 40, 40, 30, 60, 45, 60, 120, 90, 72, 72, 168, 240, 180, 144, 168, 168, 216, 420, 315, 210, 420, 420, 336, 432, 1260, 840, 840, 504, 504, 315, 480, 540, 2520, 2520, 1680, 1680, 1260, 1260, 1008, 720, 2520, 2520, 1890, 1512, 945, 3360

Offset

1,3

Links

Table of n, a(n) for n=1..55.

Example

The lexicographically earliest solutions are:
..n....m: d_1 d_2 ... d_n
-------------------------
..1....1: 1
..2....0: - -
..3....6: 1, 2, 3
..4...12: 1, 2, 3, 6
..5...24: 1, 2, 3, 6, 12
..6...24: 1, 2, 3, 4, 6, 8
..7...48: 1, 2, 3, 4, 6, 8, 24
..8...60: 1, 2, 3, 4, 5, 10, 15, 20
..9...84: 1, 2, 3, 4, 6, 7, 12, 21, 28
.10..120: 1, 2, 3, 4, 5, 6, 15, 20, 24, 40
...

Crossrefs

Cf. A081512, A081514.

See also A081515, A081516, A081517, A081521.

Sequence in context: A302784 A329889 A296347 * A338833 A342786 A293474

Adjacent sequences: A081510 A081511 A081512 * A081514 A081515 A081516

Keyword

nonn

Author

Amarnath Murthy, Mar 27 2003

Extensions

Corrected by Caleb M. Shor (cshor(AT)bates.edu), Sep 26 2007

Terms a(8) onwards from Jinyuan Wang, May 23 2020

Definition clarified by N. J. A. Sloane, May 23 2020, following suggestions from Jinyuan Wang.

Status

approved