A292335 Numbers k such that k^2 divides 10^k + 1.

1, 11, 253, 11891, 35167, 45023, 96569, 640343, 1035529, 1652849, 2221087, 19588019, 30096121, 48669863, 74901409, 88023001, 89007677, 104391089, 143938531, 154261943, 308731093, 395256917, 674608561, 725434237, 920636893, 1737332531, 2620923899, 4137081047, 4183360819, 5621571197, 6765110957, 9090909091, 10411295851, 14510361371

Offset: 1

Author

Max Alekseyev, Sep 15 2017

Keywords

• nonn

Links

• Max Alekseyev, Table of n, a(n) for n = 1..93

Crossrefs

Subsequence of A015958.

Cf. A127100, A128683.