A118187 - cp's OEIS frontend

A118187 Antidiagonal sums of triangle A118185: a(n) = Sum_{k=0..[n/2]} 4^(k(n-2k)) for n>=0.

n	a(n)
0	1
1	1
2	2
3	5
4	18
5	81
6	514
7	5185
8	73730
9	1327361
10	33685506
11	1359217665
12	77311508482
13	5567355555841
14	565149010231298
15	91215553426898945
16	20753150033413537794
17	5977902509385249259521
18	2427296516310194305630210

[1, 1, 2, 5, 18, 81, 514, 5185, 73730, 1327361, 33685506, 1359217665, 77311508482, 5567355555841, 565149010231298, 91215553426898945, 20753150033413537794, 5977902509385249259521, 2427296516310194305630210]

cp's OEIS Frontend

A118187 Antidiagonal sums of triangle A118185: a(n) = Sum_{k=0..[n/2]} 4^(k(n-2k)) for n>=0.

Table of values

List of values

cp's OEIS Frontend

A118187 Antidiagonal sums of triangle A118185: a(n) = Sum_{k=0..[n/2]} 4^(k*(n-2*k)) for n>=0.

Table of values

List of values

A118187 Antidiagonal sums of triangle A118185: a(n) = Sum_{k=0..[n/2]} 4^(k(n-2k)) for n>=0.