A055426 - OEIS

A055426 as a simple table

n	a(n)
0	1
1	5
2	13
3	33
4	89
5	221
6	485
7	953
8	1713
9	2869
10	4541
11	6865
12	9993
13	14093
14	19349
15	25961
16	34145
17	44133
18	56173
19	70529
20	87481
21	107325
22	130373
23	156953
24	187409
25	222101
26	261405
27	305713
28	355433
29	410989
30	472821
31	541385
32	617153
33	700613
34	792269
35	892641

[1,5,13,33,89,221,485,953,1713,2869,4541,6865, 9993,14093,19349,25961,34145,44133,56173,70529, 87481,107325,130373,156953,187409,222101,261405, 305713,355433,410989,472821,541385,617153,700613, 792269,892641]