Indices of the smallest of four consecutive triangular numbers summing up to a square.
A202391
Indices of the smallest of four consecutive triangular numbers summing up to a square.
Terms
- a(0) =5a(1) =39a(2) =237a(3) =1391a(4) =8117a(5) =47319a(6) =275805a(7) =1607519a(8) =9369317a(9) =54608391a(10) =318281037a(11) =1855077839a(12) =10812186005a(13) =63018038199a(14) =367296043197
External references
- oeis: A202391