Sum of squares of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly one way.
A076460
Sum of squares of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly one way.
Terms
- a(0) =1a(1) =103a(2) =1130a(3) =6070a(4) =22355a(5) =64981a(6) =160468a(7) =351660a(8) =703365a(9) =1308835a(10) =2297086a(11) =3841058a(12) =6166615a(13) =9562385a(14) =14390440a(15) =21097816a(16) =30228873a(17) =42438495a(18) =58506130a(19) =79350670a(20) =106046171a(21) =139838413a(22) =182162300a(23) =234660100a(24) =299200525a(25) =377898651a(26) =473136678a(27) =587585530a(28) =724227295
External references
- oeis: A076460