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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A074925 Numbers n such that n^3 is a sum of two successive primes. 6
2, 6, 28, 42, 72, 162, 174, 220, 222, 234, 246, 252, 296, 344, 380, 390, 486, 510, 584, 594, 638, 646, 674, 702, 720, 816, 828, 882, 942, 948, 990, 1044, 1056, 1146, 1200, 1314, 1422, 1436, 1554, 1566, 1596, 1602, 1632, 1740, 1770, 1778, 1806, 1818, 1824 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Prime(n)+ prime(n+1) as a square in A064397; n^2 as a sum of two successive primes in A074924; prime(n)+ prime(n+1) as a cube in A071220.

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000 (terms for n = 1..429 from Zak Seidov)

EXAMPLE

6^3 = 216 = 107 + 109.

PROG

(Python)

from sympy import nextprime, prevprime

A074925_list = [i for i in range(2, 10**4, 2) if prevprime(i**3//2) + nextprime(i**3//2) == i**3] # Chai Wah Wu, Feb 22 2017

CROSSREFS

Cf. A064397, A071220, A074924.

Sequence in context: A183323 A153253 A174880 * A141136 A115156 A185072

Adjacent sequences:  A074922 A074923 A074924 * A074926 A074927 A074928

KEYWORD

nonn

AUTHOR

Zak Seidov, Oct 02 2002

EXTENSIONS

More terms from Zak Seidov, Jul 22 2009

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified May 23 06:42 EDT 2017. Contains 286909 sequences.