A115943 a(n) is the least k, not multiple of 10, such that k^k contains a palindromic substring of length n.

1, 11, 6, 14, 16, 21, 51, 28, 72, 156, 203, 618, 1041, 4205, 3014, 9188, 9629, 24444, 9629, 43657, 9629, 98074, 108589

Offset

1,2

Links

Table of n, a(n) for n=1..23.

Example

a(5)=16 since the first palindromic substring of length 5
appears in 16^16=18446744(07370)9551616.

Crossrefs

Cf. A115942.

Sequence in context: A080501 A122098 A347518 * A122088 A304053 A190624

Adjacent sequences: A115940 A115941 A115942 * A115944 A115945 A115946

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Extensions

Extended by Giovanni Resta, Apr 04 2014

Status

approved