520731

Appears in sequences

• Least k such that A052343(k)=n.at n=18A052345
• Smallest number which is the sum of two positive triangular numbers in exactly n different ways.at n=18A052346
• Indices of A052343 (ways to write n as sum of two triangular numbers) where record values are reached.at n=11A052348
• Indices of A052344 (ways to write n as sum of two nonzero triangular numbers) where record values are reached.at n=11A053587
• Smallest number which is the sum of two positive triangular numbers (A000217) in at least n ways.at n=16A234004
• Smallest number which is the sum of two positive triangular numbers (A000217) in at least n ways.at n=17A234004
• a(n) is the smallest nonnegative integer that can be written as a sum of two distinct nonzero triangular numbers in exactly n ways or -1 if no such integer exists.at n=18A342326