login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A176451 Number of primes between two consecutive nonprimes in A037143. 0
2, 1, 1, 0, 2, 0, 2, 0, 1, 0, 2, 0, 0, 1, 0, 2, 1, 0, 1, 0, 0, 2, 0, 1, 2, 0, 1, 1, 0, 0, 1, 0, 0, 0, 3, 2, 1, 0, 0, 0, 0, 0, 1, 1, 0, 2, 0, 0, 0, 0, 2, 1, 0, 0, 1, 1, 1, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 3, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 1, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Two together with number of primes between successive semiprimes.

LINKS

Table of n, a(n) for n=1..105.

FORMULA

a(n+1)=A088700(n).

EXAMPLE

a(1)=2 because A037143(1)=1(nonprime) < A037143(2)=2(prime) < A037143(3)=3(prime) < A037143(4)=4(nonprime).

CROSSREFS

Sequence in context: A122821 A054009 A339210 * A091297 A166712 A035183

Adjacent sequences:  A176448 A176449 A176450 * A176452 A176453 A176454

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Apr 18 2010

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 May 12 10:54 EDT 2021. Contains 343821 sequences. (Running on oeis4.)