A226994 - cp's OEIS frontend

A226994 Number of lattice paths from (0,0) to (n,n) consisting of steps U=(1,1), H=(1,0) and S=(0,1) such that the first step leaving the diagonal (if any) is an H step.

n	a(n)
0	1
1	2
2	7
3	32
4	161
5	842
6	4495
7	24320
8	132865
9	731282
10	4048727
11	22523360
12	125797985
13	704966810
14	3961924127
15	22321190912
16	126027618305
17	712917362210
18	4039658528935
19	22924714957472
20	130271906898721
21	741188107113962
22	4221707080583087
23	24070622500965632

[1, 2, 7, 32, 161, 842, 4495, 24320, 132865, 731282, 4048727, 22523360, 125797985, 704966810, 3961924127, 22321190912, 126027618305, 712917362210, 4039658528935, 22924714957472, 130271906898721, 741188107113962, 4221707080583087, 24070622500965632]

cp's OEIS Frontend

A226994 Number of lattice paths from (0,0) to (n,n) consisting of steps U=(1,1), H=(1,0) and S=(0,1) such that the first step leaving the diagonal (if any) is an H step.

Table of values

List of values