A290449 - OEIS

A290449

Square roots of terms in A238237.

9, 45, 55, 99, 703, 999, 4950, 5050, 7272, 7777, 9999, 77778, 82656, 95121, 99999, 318682, 329967, 351352, 356643, 390313, 461539, 466830, 499500, 500500, 533170, 538461, 609687, 643357, 648648, 670033, 681318, 791505, 812890, 818181, 851851, 857143, 961038

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OFFSET

1,1

COMMENTS

Yet another variant of the Kaprekar numbers A006886.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..25000

MATHEMATICA

Sqrt[Select[Range[600000]^2, EvenQ[len=IntegerLength[#]] && # == (Mod[#, 10^(len/2)] + Floor[#/10^(len/2)])^2 &]] (* Stefano Spezia, Jan 01 2025 *)

CROSSREFS

Cf. A238237, A006886.

Sequence in context: A044111 A006886 A053816 * A045913 A044492 A207359