177310

Appears in sequences

• Doubly triangular numbers: a(n) = n*(n+1)*(n^2+n+2)/8.at n=34A002817
• 29-gonal pyramidal numbers: a(n) = n*(n+1)*(9*n-8)/2.at n=34A256649
• Triangular numbers that for some k are also the sum of the first k composites.at n=5A298270