A304902 - cp's OEIS frontend

A304902 Let (P,<) be the strict partial order on the subsets of {1,2,...,n} ordered by their cardinality. Then a(n) is the number of paths of any length from {} to {1,2,...,n}.

n	a(n)
0	1
1	1
2	3
3	16
4	175
5	4356
6	263424
7	40144896
8	15714084159
9	15953234222500
10	42223789335548788
11	292262228709213966336
12	5302397936652484482131200
13	252622720869371754406993137664
14	31660291085217875120800516475520000
15	10454334647424614439930776175842716286976

[1, 1, 3, 16, 175, 4356, 263424, 40144896, 15714084159, 15953234222500, 42223789335548788, 292262228709213966336, 5302397936652484482131200, 252622720869371754406993137664, 31660291085217875120800516475520000, 10454334647424614439930776175842716286976]

cp's OEIS Frontend

A304902 Let (P,<) be the strict partial order on the subsets of {1,2,...,n} ordered by their cardinality. Then a(n) is the number of paths of any length from {} to {1,2,...,n}.

Table of values

List of values