Number of bracketings of 0^0^0^...^0, with n 0's, giving the result 0, with conventions that 0^0 = 1^0 = 1^1 = 1, 0^1 = 0.

A055113

Number of bracketings of 0^0^0^...^0, with n 0's, giving the result 0, with conventions that 0^0 = 1^0 = 1^1 = 1, 0^1 = 0.

Terms

    a(0) =0a(1) =1a(2) =0a(3) =1a(4) =1a(5) =5a(6) =11a(7) =41a(8) =120a(9) =421a(10) =1381a(11) =4840a(12) =16721a(13) =59357a(14) =210861a(15) =759071a(16) =2744393a(17) =10000437a(18) =36609977a(19) =134750450a(20) =498016753a(21) =1848174708a(22) =6882643032a(23) =25715836734a(24) =96365606679a(25) =362102430069

External references