A050630 a(n+1) is next smallest nontrivial square containing a(n) as a substring, initial term is 4.

4, 49, 1849, 18496, 103184964, 7383508103184964, 544680602158273835081031849649

Offset: 1

Author

Patrick De Geest, Jul 15 1999

Keywords

• nonn
• base
• more

Crossrefs

Starting with a(2)=49, the sequence is identical A050632.

Cf. A050631, A048559, A050636.

Formula

a(n) = A050631(n)^2.

Extensions

a(7) from Max Alekseyev, Feb 15 2012