Triangular numbers such that the binary representation is of the form either Tbt or Tt, where T and t are binary representations of triangular numbers with equal binary length, and b is a binary digit: b = 1 or 0.
A226736
Triangular numbers such that the binary representation is of the form either Tbt or Tt, where T and t are binary representations of triangular numbers with equal binary length, and b is a binary digit: b = 1 or 0.
Terms
- a(0) =3a(1) =6a(2) =15a(3) =28a(4) =105a(5) =351a(6) =496a(7) =1830a(8) =7140a(9) =30876a(10) =129795a(11) =508536a(12) =2029105a(13) =8260080a(14) =32817151a(15) =33550336a(16) =133179360a(17) =533811475a(18) =2139135936a(19) =8564460003a(20) =34292793216a(21) =137220150385a(22) =549219598080
External references
- oeis: A226736