245738

Appears in sequences

• a(n) = index of triangular number A077002(n).at n=14A077003
• G.f. = b(2)*b(4)*b(6)/(x^9+x^8+x^7+x^6-x^5-x^4-x^3-x^2-x+1), where b(k) = (1-x^k)/(1-x).at n=17A266372