323078

Appears in sequences

• a(n) = 1*4*7 + 4*7*10 + 7*10*13 + ... (n terms).at n=14A196513
• Expansion of (1/(1 - x)) * Sum_{k>=0} x^(2*k+1) / Product_{j=1..2*k+1} (1 - x^j).at n=46A306145