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A328886 Squares that end in 444. 2
1444, 213444, 289444, 925444, 1077444, 2137444, 2365444, 3849444, 4153444, 6061444, 6441444, 8773444, 9229444, 11985444, 12517444, 15697444, 16305444, 19909444, 20593444, 24621444, 25381444, 29833444, 30669444, 35545444, 36457444, 41757444, 42745444, 48469444 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A039685 for further information about these numbers.

Conjecture: satisfies a linear recurrence having signature (1,2,-2,-1,1). - Harvey P. Dale, Jun 19 2020

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..400

FORMULA

a(n) = A039685(n)^2.

MATHEMATICA

Select[Table[n*10^3+444, {n, 50000}], IntegerQ[Sqrt[#]]&] (* Harvey P. Dale, Jun 19 2020 *)

PROG

(PARI) a039685(n) = 250*n+87*(-1)^n-125

a(n) = a039685(n)^2

CROSSREFS

Cf. A039685.

Sequence in context: A105416 A298222 A180465 * A031754 A031536 A181973

Adjacent sequences:  A328883 A328884 A328885 * A328887 A328888 A328889

KEYWORD

nonn,base,easy

AUTHOR

Felix Fröhlich, Oct 29 2019

STATUS

approved

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Last modified September 20 03:57 EDT 2020. Contains 337264 sequences. (Running on oeis4.)