A163300 Even numbers without 2.

0, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132

Offset: 1

Author

Juri-Stepan Gerasimov, Jul 26 2009

Keywords

• nonn
• easy

Comments

Zero together with the even nonprimes. - Omar E. Pol, Aug 04 2009

A163300 U A014076 = A141468.

The nonprime numbers (A018252) begin: 1,4,6,8,9,10,12,14,15,... So the words "prime" and "nonprime" normally refer to the natural numbers or positive integers: 1,2,3,4,5,6,... (Zero is not a member of A018252. See also the definition of A141468). - Omar E. Pol, Aug 04 2009

Links

• G. C. Greubel, Table of n, a(n) for n = 1..1000
• Index entries for linear recurrences with constant coefficients, signature (2,-1).

Crossrefs

Cf. A087156, A014076, A141468, A018252.

Programs

Mathematica

Drop[Range[0,132,2],{2}] (* Harvey P. Dale, May 05 2012 *)

PARI

a(n)=if(n>1,2*n,0) \\ Charles R Greathouse IV, Apr 17 2024

Python

def A163300(n): return n<<1 if n>1 else 0 # Chai Wah Wu, Jul 31 2024

Formula

a(n) = 2*A087156(n).

Extensions

New definition from Charles R Greathouse IV, Jun 23 2024