A364727 Numbers k such that k and k+1 are both admirable numbers (A111592).

29691198404, 478012798575, 2789405835075, 22929723392715

Offset: 1

Author

Amiram Eldar, Aug 05 2023

Keywords

• nonn
• hard
• more

Comments

a(1)-a(2) were found by Giovanni Resta.

Links

• Giovanni Resta, admirable numbers, Numbers Aplenty.

Crossrefs

Subsequence of A096399 and A111592.

Cf. A109729, A109730.

Extensions

a(4) from Martin Ehrenstein, Aug 06 2023