A063734 - OEIS

A063734

Square abundant numbers.

36, 100, 144, 196, 324, 400, 576, 784, 900, 1296, 1600, 1764, 1936, 2304, 2500, 2704, 2916, 3136, 3600, 4356, 4624, 4900, 5184, 5776, 6084, 6400, 7056, 7744, 8100, 8464, 9216, 9604, 10000, 10404, 10816, 11025, 11664, 12100, 12544, 12996, 13456, 14400

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[150]^2, DivisorSigma[1, #]>2#&] (* Harvey P. Dale, Aug 14 2014 *)

PROG

(PARI) j=[]; for(n=1, 25000, if(sigma(n)>(2*n), a=n; if(issquare(a), j=concat(j, a)))); j

(PARI) { n=0; for (m=1, 10^9, if (issquare(m) && sigma(m)>(2*m), write("b063734.txt", n++, " ", m); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 29 2009

(PARI) { n=0; for (m=1, 10^9, s=m^2; if (sigma(s)>(2*s), write("b063734.txt", n++, " ", s); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 29 2009

CROSSREFS

Cf. A005101.

Sequence in context: A131605 A376119 A296204 * A069057 A342402 A348826

Adjacent sequences: A063731 A063732 A063733 * A063735 A063736 A063737

KEYWORD

nonn

AUTHOR

Jason Earls, Aug 13 2001

STATUS

approved