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A001331 Number of n-element algebras with 1 ternary operation.
(Formerly M5395 N2344)
2
1, 130, 1270932917454, 14178431955039102644307345678938144832, 19591572513704791799478942287037427963644425946432640042160816616766795992851260047500, 1672390093955882094725125078968449171301017629802018367164057251590306327375884442617701277598562886114475651122751129803783336384871488080121922759032559677888042592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

M. A. Harrison, The number of isomorphism types of finite algebras, Proc. Amer. Math. Soc., 17 (1966), 731-737.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A091510.

Sequence in context: A224112 A184283 A246242 * A291620 A145096 A210498

Adjacent sequences:  A001328 A001329 A001330 * A001332 A001333 A001334

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Pab Ter (pabrlos(AT)yahoo.com), May 06 2004

STATUS

approved

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Last modified February 21 07:18 EST 2018. Contains 299390 sequences. (Running on oeis4.)