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A038400 List of pairs of consecutive numbers each with 6 divisors (duplicates removed). 3
44, 45, 75, 76, 98, 99, 116, 117, 147, 148, 171, 172, 242, 243, 244, 245, 332, 333, 387, 388, 507, 508, 548, 549, 603, 604, 605, 724, 725, 844, 845, 908, 909, 931, 932, 963, 964, 1075, 1076, 1083, 1084, 1251, 1252, 1324, 1325, 1412, 1413, 1467, 1468, 1556, 1557, 1587, 1588 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

D. Wells, The Penguin Dictionary of Curious and Interesting Numbers, Penguin Books, p. 103

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..3000

MATHEMATICA

SequencePosition[DivisorSigma[0, Range[1600]], {6, 6}]//Flatten//Union (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Aug 23 2017 *)

CROSSREFS

Cf. A049103, A049104.

Sequence in context: A085519 A112815 A242934 * A254750 A225619 A121610

Adjacent sequences:  A038397 A038398 A038399 * A038401 A038402 A038403

KEYWORD

nonn

AUTHOR

Felice Russo

EXTENSIONS

More terms from Olivier Gérard

STATUS

approved

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Last modified October 20 02:35 EDT 2019. Contains 328244 sequences. (Running on oeis4.)