login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A269244 Number of times the digit 4 appears in the decimal expansion of n^3. 12
0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, 1, 0, 2, 0, 1, 0, 1, 0, 2, 1, 1, 1, 2, 1, 0, 2, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,15

COMMENTS

The cubes corresponding to the first occurrence of 1, 2, 3, ... are listed in A036531, i.e., A036531(n)^(1/3) = A048369(n) is the index of the first occurrence of n.

LINKS

Table of n, a(n) for n=0..94.

EXAMPLE

0^3 = 0, 1^3 = 1, 2^3 = 8 and 3^3 = 27 all have a(0) = a(1) = a(2) = a(3) = 0 digits '4'.

4^3 = 64 has a(4) = 1 digit '4'.

14^3 = 2744 has a(14) = 2 digits '4'.

PROG

(PARI) A269244(n)=#select(t->t==4, digits(n^3))

CROSSREFS

Cf. A036531 and A036527 - A036536; A048369 and A048365 - A048374.

Analog for the other digits 0, 1, ..., 9: A269250, A269241, A269242, A269243, A269244, A269245, A269246, A269247, A269248, A269249.

Analog for squares: A086012 (digit 4), and A086008 - A086017 for digits 0 - 9.

Sequence in context: A231366 A158924 A025426 * A204246 A053200 A050870

Adjacent sequences:  A269241 A269242 A269243 * A269245 A269246 A269247

KEYWORD

nonn,base

AUTHOR

M. F. Hasler, Feb 20 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 26 04:02 EDT 2019. Contains 324368 sequences. (Running on oeis4.)