A116220 - cp's OEIS frontend

A116220 If X_1,...,X_n is a partition of a 4n-set X into 4-blocks then a(n) is equal to the number of permutations f of X such that f(X_i) <> X_i, (i=1,...,n).

n	a(n)
1	0
2	39744
3	476126208
4	20876944084992
5	2430394026897309696
6	620098244484731975761920
7	304784138698487640049544331264
8	263072308376236973471661993731555328
9	371936496850567880606221498503260339699712
10	815826011669313721421241471652159968573722198016

[0, 39744, 476126208, 20876944084992, 2430394026897309696, 620098244484731975761920, 304784138698487640049544331264, 263072308376236973471661993731555328, 371936496850567880606221498503260339699712, 815826011669313721421241471652159968573722198016]

cp's OEIS Frontend

A116220 If X_1,...,X_n is a partition of a 4n-set X into 4-blocks then a(n) is equal to the number of permutations f of X such that f(X_i) <> X_i, (i=1,...,n).

Table of values

List of values