A357419 - cp's OEIS frontend

A357419 a(n) is the hafnian of the 2n X 2n symmetric Pascal matrix defined by M[i, j] = A007318(i + j - 2, i - 1).

n	a(n)
0	1
1	1
2	17
3	4929
4	23872137
5	1901611778409
6	2469317979267366913
7	52019468048773355156225921
8	17726418489020770628047341494927089
9	97518325438289444681986165275143492027985129
10	8648473129650550498122567373327602114148485950241817345

[1, 1, 17, 4929, 23872137, 1901611778409, 2469317979267366913, 52019468048773355156225921, 17726418489020770628047341494927089, 97518325438289444681986165275143492027985129, 8648473129650550498122567373327602114148485950241817345]

cp's OEIS Frontend

A357419 a(n) is the hafnian of the 2n X 2n symmetric Pascal matrix defined by M[i, j] = A007318(i + j - 2, i - 1).

Table of values

List of values