Hankel transform of a(n) is A006720(n). Hankel transform of a(n+1) is A006720(n+2).

A254314

Hankel transform of a(n) is A006720(n). Hankel transform of a(n+1) is A006720(n+2).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =43a(6) =143a(7) =507a(8) =1887a(9) =7279a(10) =28828a(11) =116455a(12) =477709a(13) =1983779a(14) =8321474a(15) =35203777a(16) =150014157a(17) =643302743a(18) =2773997104a(19) =12020733635a(20) =52319374842a(21) =228616865437

External references