201955

Appears in sequences

• Expansion of (1 +3*x -x^2)/((1-x^2)*(1-2*x-x^2)); a Pellian-related sequence.at n=13A114688
• Values of m such that m^2 + 3 is a triangular number (A000217).at n=7A276598
• Numbers that are the sum of six fourth powers in ten or more ways.at n=11A345567