cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A158245 Primitive numbers in A158235.

Original entry on oeis.org

11, 20, 39, 49, 133, 247, 543, 1218, 1651, 1729, 2289, 3097, 4171, 4503, 6231, 7303, 7540, 7563, 8773, 9139, 12439, 16627, 16761, 17157, 20280, 22021, 22393, 37051, 37209, 37387, 45201, 47257, 51961, 65379, 66211, 69601, 100191, 103861, 105339
Offset: 1

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Author

T. D. Noe, Mar 14 2009

Keywords

Comments

The primitive terms in A158235 are the ones for which the repdigit is squarefree. Hence n^2 = d*(b^k-1)/(b-1) with d squarefree and d

Examples

			105339^2 = 333 in base 60817.