290511

Appears in sequences

• Partial sums of (Catalan numbers starting 1, 2, 5, ...).at n=12A014138
• Expansion of (1 + sqrt(1 + 4x))/(2(1 + x)).at n=13A099324
• Fixed points of the permutation A125987/A125988.at n=39A126298
• Number of refinements of the partition n^1 with all numbers taken modulo 2.at n=22A276032
• Number of generalizations of the partition 1^n with all elements taken modulo 2.at n=22A276033
• Number of unoriented polyominoes with n octagonal cells of the hyperbolic regular tiling with Schläfli symbol {8,oo}.at n=8A389937