Number of North-East paths from (0,0) to (n,n) that have even number of times bounce off y = x to the right.
A268430
Number of North-East paths from (0,0) to (n,n) that have even number of times bounce off y = x to the right.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =53a(5) =184a(6) =654a(7) =2368a(8) =8689a(9) =32216a(10) =120434a(11) =453248a(12) =1715266a(13) =6521584a(14) =24894364a(15) =95353472a(16) =366324729a(17) =1411015064a(18) =5447548682a(19) =21074836864a(20) =81682204614a(21) =317110750672
External references
- oeis: A268430