a(n) is the smallest number whose symmetric representation of sigma consists of n copies of unimodal pattern 121 (separated by 0's if n > 1).

A372181

a(n) is the smallest number whose symmetric representation of sigma consists of n copies of unimodal pattern 121 (separated by 0's if n > 1).

Terms

    a(0) =6a(1) =78a(2) =1014a(3) =12246a(4) =171366a(5) =1922622a(6) =28960854a(7) =300014754a(8) =4174476774

External references