Convolution of nonzero repunits (A002275) with themselves.

A272525

Convolution of nonzero repunits (A002275) with themselves.

Terms

    a(0) =1a(1) =22a(2) =343a(3) =4664a(4) =58985a(5) =713306a(6) =8367627a(7) =96021948a(8) =1083676269a(9) =12071330590a(10) =133058984911

External references