Triangular numbers with arithmetic mean of digits = 1 (sum of digits = number of digits).

A069790

Triangular numbers with arithmetic mean of digits = 1 (sum of digits = number of digits).

Terms

    a(0) =1a(1) =120a(2) =210a(3) =300a(4) =112101a(5) =100600020a(6) =101111310a(7) =110120220a(8) =200130021a(9) =200310120a(10) =1000051003a(11) =1010004040a(12) =1130002030a(13) =1411000003a(14) =2002021003a(15) =3200200003a(16) =5000050000a(17) =100110002070a(18) =111111101310a(19) =111202101003a(20) =180000300000a(21) =211104100200a(22) =231201020001a(23) =500001500001a(24) =501001000500

External references