1,1

These correspond to deficient numbers as this is sequence A005940(1+A005100(n)) sorted into ascending order. Subsequence of A324720.

Antti Karttunen, Table of n, a(n) for n = 1..7676 (based on Hans Havermann's factorization of A156552)

Index entries for sequences computed from indices in prime factorization

Index entries for sequences related to sigma(n)

Cf. A005100, A005940, A156552, A323243, A323244, A324732 (characteristic function).

Cf. A324551, A324201, A324720.

Sequence in context: A031980 A183221 A317492 * A327534 A305732 A265999

Adjacent sequences: A324718 A324719 A324720 * A324722 A324723 A324724

nonn

Antti Karttunen, Mar 12 2019

approved