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

1,1

Links

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

Example

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

Crossrefs

Cf. A116499, A116502.

Sequence in context: A289024 A145639 A285836 * A289745 A289639 A283665

Adjacent sequences: A116498 A116499 A116500 * A116502 A116503 A116504

Keyword

base,nonn

Author

Giovanni Resta, Feb 18 2006

Extensions

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

Status

approved