a(1) = 1, a(2) = 2, a(n) = a(n-1) + d where d is the sum of the absolute differences between all pairs of previous terms.

A089708

a(1) = 1, a(2) = 2, a(n) = a(n-1) + d where d is the sum of the absolute differences between all pairs of previous terms.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =7a(4) =26a(5) =136a(6) =887a(7) =6785a(8) =59116a(9) =576528a(10) =6215729a(11) =73368729a(12) =940718528a(13) =13016462714a(14) =193285275705

External references