A138842 Concatenation of initial and final digits of n-th even superperfect number A061652(n).

22, 44, 16, 64, 46, 66, 24, 14, 16, 36, 84, 84, 36, 24, 54, 74, 26, 16, 96, 14, 26, 16, 16, 26, 26, 26, 46, 24, 24, 26, 34, 84, 66, 24, 46, 36, 66, 26, 46, 64, 14, 64, 16, 66, 14, 86, 16

Offset

1,1

Comments

Also, concatenation of initial and final digits of n-th superperfect number A019279(n), if there are no odd superperfect numbers.

Also, concatenation of A138124(n) and A138125(n).

Links

Table of n, a(n) for n=1..47.

Crossrefs

Cf. A019279, A061652, A073729, A138124, A138125, A138838, A138840, A138841, A138843, A138844.

Sequence in context: A166058 A305609 A123799 * A040462 A269310 A015799

Adjacent sequences: A138839 A138840 A138841 * A138843 A138844 A138845

Keyword

nonn,base,more,less

Author

Omar E. Pol, Apr 02 2008

Extensions

More terms from Jinyuan Wang, Mar 14 2020

Status

approved