A007155 (2^(2^n))*(3^(3^n - 2^n)).

2, 12, 3888, 297538935552, 675089708540070294583610393745358848, 202089899117162771494026986677587201812698520846319037282893739002965043835199487594696085800714664172178112512

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

References

• J. Berman, ``Free spectra of 3-element algebras,'' in R. S. Freese and O. C. Garcia, editors, Universal Algebra and Lattice Theory (Puebla, 1982), Lect. Notes Math. Vol. 1004, 1983.
• N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

• J. Berman, Free spectra of 3-element algebras, R. S. Freese and O. C. Garcia, editors, Universal Algebra and Lattice Theory (Puebla, 1982), Lect. Notes Math. Vol. 1004, 1983. (Annotated scanned copy)

Programs

Maple

[seq((2^(2^n))*(3^(3^n - 2^n)),n=0..5)];