A358037 a(n) is the number of possible standard CMOS cells with a maximum of n stages.

1, 6, 80, 3434

Offset

1,2

Comments

My colleague, Hagen Sankowski, has independently verified the first few numbers and then stumbled across the paper from 1981.

Links

Table of n, a(n) for n=1..4.

Sankowski, GitHub repository of the StdCellLib software which we are generating standard cells, which we used to re-discover the sequence with.

Uehara & Vancleemput, Optimal Layout of CMOS Functional Arrays, IEEE Transactions on Computers, 1981, C-30(5), 305-312.

Example

For n = 2 there are 6 possible different standard cells with a maximum of 2 stages.

Crossrefs

Sequence in context: A323694 A077393 A264694 * A002676 A374923 A052348

Adjacent sequences: A358034 A358035 A358036 * A358038 A358039 A358040

Keyword

nonn,more

Author

Philipp Gühring, Oct 26 2022

Status

approved