A026003 - cp's OEIS frontend

A026003 a(n) = T([n/2],[(n+1)/2]), where T = Delannoy triangle (A008288).

n	a(n)
0	1
1	1
2	3
3	5
4	13
5	25
6	63
7	129
8	321
9	681
10	1683
11	3653
12	8989
13	19825
14	48639
15	108545
16	265729
17	598417
18	1462563
19	3317445
20	8097453
21	18474633
22	45046719
23	103274625
24	251595969
25	579168825
26	1409933619
27	3256957317
28	7923848253
29	18359266785
30	44642381823

[1, 1, 3, 5, 13, 25, 63, 129, 321, 681, 1683, 3653, 8989, 19825, 48639, 108545, 265729, 598417, 1462563, 3317445, 8097453, 18474633, 45046719, 103274625, 251595969, 579168825, 1409933619, 3256957317, 7923848253, 18359266785, 44642381823]

cp's OEIS Frontend

A026003 a(n) = T([n/2],[(n+1)/2]), where T = Delannoy triangle (A008288).

Table of values

List of values