A072051 Smallest k such that gcd(k, reverse(k)) = 11^n.

11, 121, 1331, 14641, 121110352, 1332213872, 105923336431682, 4676049710123077, 36606937477221265, 30983951005022964839, 1365869521861436622239

Offset: 1

Author

Labos Elemer, Jun 10 2002

Keywords

• base
• nonn

Examples

			a(8) = 4676049710123077 = (11^8)*13*1678009, reverse(a(8)) = 7703210179406764 = (11^8)*2*2*157*57223.
		

Crossrefs

Cf. A004086, A055483, A069554, A071686 (=2^n), A072005 (=3^n), A072021 (=5^n), A072050 (=7^n).

Formula

a(n) = A069554(11^n).

Extensions

a(9)-a(11) from Sean A. Irvine, Sep 02 2024