login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A099380 The imaginary part of -n', the arithmetic derivative for Gaussian integers. 7
0, 0, 2, 0, 8, 3, 6, 0, 24, 0, 16, 0, 24, 5, 14, 9, 64, 5, 18, 0, 52, 0, 22, 0, 72, 30, 36, 0, 56, 7, 48, 0, 160, 0, 44, 21, 72, 7, 38, 15, 144, 9, 42, 0, 88, 27, 46, 0, 192, 0, 110, 15, 124, 9, 54, 33, 168, 0, 72, 0, 156, 11, 62, 0, 384, 64, 66, 0, 156, 0, 112, 0, 216, 11, 88, 90, 152 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
a(n) is zero when n is 0, 1, or the product of Gaussian primes (A002145).
REFERENCES
LINKS
MATHEMATICA
(* see A099379 for the definition of the di function *) Im[Table[ -di[n], {n, 0, 100}]]
CROSSREFS
Cf. A003415 (arithmetic derivative of n), A099379 (real part of the Gaussian-integer derivative of n).
Cf. A218854, A218855 (triangles of derivatives of Gaussian integers).
Sequence in context: A182524 A212832 A021052 * A252852 A351483 A370692
KEYWORD
nice,nonn
AUTHOR
T. D. Noe, Oct 14 2004
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 24 16:36 EDT 2024. Contains 373680 sequences. (Running on oeis4.)