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A113468 Least k such that n, n+k, n+2k and n+3k have the same number of divisors. 1
242, 213, 3445, 111, 8718, 5, 2001, 69, 3526, 299, 1074, 5, 2222, 537, 9177, 129, 4114, 5, 8, 598, 7843, 111, 1235, 10, 2984, 303, 3538, 417, 987, 7, 1771, 91, 7659, 57, 9269, 10, 2264, 145, 1197, 219, 1606, 5, 1826, 115, 8897, 203, 618, 5, 8, 159, 2673, 183 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Fourth row of A113465.

LINKS

Table of n, a(n) for n=1..52.

EXAMPLE

a(19) = 8 because 8, 27, 46 and 65 each have 4 divisors.

CROSSREFS

Cf. A113465.

Sequence in context: A171242 A259092 A060110 * A220089 A039665 A259719

Adjacent sequences:  A113465 A113466 A113467 * A113469 A113470 A113471

KEYWORD

nonn

AUTHOR

David Wasserman, Jan 08 2006

STATUS

approved

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)