情形

(v,k,λ)

G

基区B

设计

1

(15,8,4)

$A_5\left(15\right)$

{1, 2, 3, 4, 5, 6, 7, 15}

$D_1$

2

(15,8,4)

$F\left(5\right)\left[1/2\right]S\left(3\right)$

{1, 2, 3, 4, 6, 8, 9, 12}

$\cong D_1$

3

(15,8,4)

$\text{GL}\left(2,4\right)$

{1, 7, 10, 12, 3, 5, 8, 14}

$\cong D_1$

4

(15,8,4)

$S_5$

{1, 3, 5, 7, 8, 10, 12, 14}

$\cong D_1$

5

(15,8,4)

$A_6$

{2, 3, 6, 7, 8, 9, 12, 13}

$\cong D_1$

6

(15,8,4)

$3S_5$

{1, 3, 5, 7, 8, 10, 12, 14}

$\cong D_1$

7

(15,8,4)

$S_6$

{1, 4, 5, 8, 9, 12, 13, 15}

$\cong D_1$

8

(15,8,4)

$A_7$

{2, 4, 6, 8, 10, 12, 14, 15}

$\cong D_1$

9

(15,8,4)

$\text{PSL}(4,2)$

{1, 6, 7, 10, 11, 12, 13, 15}

$\cong D_1$