Positive numbers k with the property that some permutation of the digits of k is a triangular number.
A007960
Positive numbers k with the property that some permutation of the digits of k is a triangular number.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =10a(4) =12a(5) =15a(6) =19a(7) =21a(8) =28a(9) =30a(10) =36a(11) =45a(12) =51a(13) =54a(14) =55a(15) =60a(16) =63a(17) =66a(18) =78a(19) =82a(20) =87a(21) =91a(22) =100a(23) =102a(24) =105a(25) =109a(26) =117a(27) =120a(28) =123a(29) =132
External references
- oeis: A007960