A362916 Least weird number (A006037) with exactly n divisors that are weird numbers, or -1 if no such number exists.

70, 10430, 1554070, 5681270, 34501908070, 1436692670

Offset

1,1

Comments

a(8) = 5702250610, and there are no more terms below 10^11.

Links

Table of n, a(n) for n=1..6.

Example

Table of the weird divisors for the first 6 terms:
  n  a(n)         weird divisors
  -  -----------  ----------------------------------------------
  1  70           70
  2  10430        70, 10430
  3  1554070      70, 10430, 1554070
  4  5681270      70, 19390, 20510, 5681270
  5  34501908070  70, 10430, 1554070, 231556430, 34501908070
  6  1436692670   70, 14770, 32270, 3116470, 6808970, 1436692670

Crossrefs

Cf. A006037, A002975.

Sequence in context: A184275 A179713 A330244 * A229776 A362169 A231054

Adjacent sequences: A362913 A362914 A362915 * A362917 A362918 A362919

Keyword

nonn,hard,more

Author

Amiram Eldar, May 26 2023

Status

approved