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A052265 Triangle giving a(n,r) = number of equivalence classes of Boolean functions of n variables and range r=0..2^n under action of symmetric group. 5
1, 1, 1, 2, 1, 1, 3, 4, 3, 1, 1, 4, 9, 16, 20, 16, 9, 4, 1, 1, 5, 17, 52, 136, 284, 477, 655, 730, 655, 477, 284, 136, 52, 17, 5, 1, 1, 6, 28, 134, 625, 2674, 10195, 34230, 100577, 258092, 579208, 1140090, 1974438, 3016994, 4077077, 4881092, 5182326, 4881092 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

M. A. Harrison, Introduction to Switching and Automata Theory. McGraw Hill, NY, 1965, p. 147.

LINKS

Table of n, a(n) for n=0..53.

Index entries for sequences related to Boolean functions

EXAMPLE

[1, 1], [1, 2, 1], [1, 3, 4, 3, 1], [1, 4, 9, 16, 20, 16, 9, 4, 1], ...

CROSSREFS

Row sums give A003180.

Sequence in context: A305431 A128314 A025564 * A306565 A055068 A237498

Adjacent sequences:  A052262 A052263 A052264 * A052266 A052267 A052268

KEYWORD

nonn,tabf,nice

AUTHOR

Vladeta Jovovic, Feb 04 2000

STATUS

approved

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Last modified February 21 05:23 EST 2020. Contains 332086 sequences. (Running on oeis4.)