A359132 Least m such that the sum of the aliquot parts of m (A001065) equals n, or -1 if no such number exists.

1, 2, -1, 4, 9, -1, 6, 8, 10, 15, 14, 21, 121, 27, 22, 16, 12, 39, 289, 65, 34, 18, 20, 57, 529, 95, 46, 69, 28, 115, 841, 32, 58, 45, 62, 93, 24, 155, 1369, 217, 44, 63, 30, 50, 82, 123, 52, 129, 2209, 75, 40, 141, -1, 235, 42, 36, 106, 99, 68, 265, 3481, 371, 118, 64, 56, 117, 54

Offset

0,2

Comments

"Least inverse" to A001065.

A070015 is essentially the same, except it has a different offset and a different "escape clause" value.

Links

Thomas Scheuerle, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A001065, A070015.

Sequence in context: A145864 A306392 A182739 * A076014 A120458 A183244

Adjacent sequences: A359129 A359130 A359131 * A359133 A359134 A359135

Keyword

sign

Author

N. J. A. Sloane, Jan 10 2023

Status

approved