A376317 - cp's OEIS frontend

A376317 a(n) = P(n+1, n+1) where P(n, m) = P(n, m-1) + P(n-1, m + f(m-n)) for n < m with P(n, m) = P(n-1, m) for 0 <= m <= n and P(0, m) = 1 for m >= 0 and where f(n) = [(n mod 4) > 0].

n	a(n)
0	1
1	2
2	6
3	23
4	100
5	466
6	2270
7	11413
8	58776
9	308473
10	1643922
11	8872220
12	48393710
13	266357916
14	1477471248
15	8251090171
16	46353709956
17	261783417427
18	1485374891782
19	8463626764923
20	48408809202918
21	277834282516061
22	1599585546691518
23	9235769089804804
24	53466364700486982

[1, 2, 6, 23, 100, 466, 2270, 11413, 58776, 308473, 1643922, 8872220, 48393710, 266357916, 1477471248, 8251090171, 46353709956, 261783417427, 1485374891782, 8463626764923, 48408809202918, 277834282516061, 1599585546691518, 9235769089804804, 53466364700486982]

cp's OEIS Frontend

A376317 a(n) = P(n+1, n+1) where P(n, m) = P(n, m-1) + P(n-1, m + f(m-n)) for n < m with P(n, m) = P(n-1, m) for 0 <= m <= n and P(0, m) = 1 for m >= 0 and where f(n) = [(n mod 4) > 0].

Table of values

List of values