100684

Appears in sequences

• Sum of n-th row of triangle of 4th powers: 1; 1 16 1; 1 16 81 16 1; 1 16 81 256 81 16 1; ... (cf. A133824).at n=11A061803
• Expansion of Product_{k>=1} 1/(1 - 2*k*x^k).at n=12A265951