1416477

Appears in sequences

• Expansion of 1/((1-x)(1-5x)(1-9x)(1-12x)).at n=5A023772
• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n-1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 4.at n=20A049945