26401

Appears in sequences

• Strong pseudoprimes to base 99.at n=22A020325
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.at n=8A149719
• a(n) = 66*n^2 + 1.at n=20A158689
• Expansion of g.f. (1-2*x+51*x^2)/(1-x)^3.at n=33A257352
• Expansion of (1 + x - x^2 - x^3 - x^4)/((1 - x)*(1 - x - 2*x^2 - 2*x^3 - x^4)).at n=12A272362
• Number of parts in all partitions of n in which no part occurs more than six times.at n=28A320609