A278393 - cp's OEIS frontend

A278393 Number of positive meanders (walks starting at the origin and ending at any altitude > 0 that never touch or go below the x-axis in between) with n steps from {-4,-3,-2,-1,0,1,2,3,4}.

n	a(n)
0	1
1	4
2	26
3	194
4	1521
5	12289
6	101205
7	844711
8	7120398
9	60477913
10	516774114
11	4437360897
12	38256405777
13	330948944639
14	2871299293535
15	24973776734091
16	217690276938940
17	1901204163460913
18	16632544424086901
19	145730139895667887
20	1278596503973570665
21	11231908572986043199

[1, 4, 26, 194, 1521, 12289, 101205, 844711, 7120398, 60477913, 516774114, 4437360897, 38256405777, 330948944639, 2871299293535, 24973776734091, 217690276938940, 1901204163460913, 16632544424086901, 145730139895667887, 1278596503973570665, 11231908572986043199]

cp's OEIS Frontend

A278393 Number of positive meanders (walks starting at the origin and ending at any altitude > 0 that never touch or go below the x-axis in between) with n steps from {-4,-3,-2,-1,0,1,2,3,4}.

Table of values

List of values