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

29691198404, 478012798575, 2789405835075, 22929723392715

Offset

1,1

Comments

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

Links

Table of n, a(n) for n=1..4.

Giovanni Resta, admirable numbers, Numbers Aplenty.

Crossrefs

Subsequence of A096399 and A111592.

Cf. A109729, A109730.

Sequence in context: A252839 A307760 A216017 * A172852 A172694 A290503

Adjacent sequences: A364724 A364725 A364726 * A364728 A364729 A364730

Keyword

nonn,hard,more

Author

Amiram Eldar, Aug 05 2023

Extensions

a(4) from Martin Ehrenstein, Aug 06 2023

Status

approved