220780

Appears in sequences

• a(n) = the least integer that is polygonal in exactly n ways.at n=10A063778
• a(n) = (n+1)*(n+2)^2*(n+3)*(7n^2 + 28n + 30)/360.at n=13A114244
• Smallest triangular number whose decimal expansion ends (nontrivially) with the n-th triangular number.at n=38A229262
• Numbers that have exactly 10 representations as a k-gonal number, P(n,k) = n*((k-2)*n - (k-4))/2, k and n >= 3.at n=0A321160