A116501 Numbers k such that the base-10 representation of k^2 has the structure dmdmd, where d is a single digit and m is a string of digits.

264, 238165, 309097, 1052631579, 1104579631, 2076555028, 2105263158, 2209159262, 3004048583, 3157894737, 30762132977, 107438016531, 214876033062, 10909090909091, 21818181818182, 1001889106154509, 1047612381019049, 1109550442957111, 1113036341252109, 1123107893966631, 1136632365773631, 1168831168831171

Offset: 1

Author

Giovanni Resta, Feb 18 2006

Keywords

• base
• nonn

Examples

			309097^2 = 9[5540]9[5540]9.
		

Links

• Max Alekseyev, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A116499, A116502.

Extensions

Terms a(17) onward from Max Alekseyev, Oct 14 2024