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A056762 Number of terms in A056761 (i.e., odd numbers from A056757) between 2^(n-1) and 2^n. 0
0, 1, 2, 2, 3, 8, 5, 12, 19, 13, 25, 31, 22, 33, 28, 17, 24, 12, 6, 4, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..24.

FORMULA

Occurrences of odd integers x such that 2^(n-1) < x <= 2^n and the cube of number of divisors is larger than the number: A000005(x)^3 > x.

EXAMPLE

A056761 is finite and has 267 terms. The last 4 terms arise between 524288 and 1048576: {675675, 765765, 855855, 883575}, thus here a(20)=4. For n > 20, a(n)=0.

CROSSREFS

Cf. A000005, A029837, A035033-A035035, A034884, A056757-A056767.

Sequence in context: A210190 A070267 A205374 * A213329 A069830 A153935

Adjacent sequences:  A056759 A056760 A056761 * A056763 A056764 A056765

KEYWORD

nonn,more

AUTHOR

Labos Elemer, Aug 16 2000

STATUS

approved

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Last modified January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)