24162

Appears in sequences

• Number of different (by numeric value, not by structure) expressions, consisting of N symbols, each of them is one of: nullary 1, unary sqrt(), binary +.at n=20A158415
• Number of connected self-dual nets with 2n nodes.at n=4A320995
• Number of compositions of n with all adjacent parts (x, y) satisfying x >= 2y or y >= 2x.at n=22A342333
• Square table, read by antidiagonals: the g.f. for row n is given recursively by (2*n-1)*x*R(n,x) = 1 + (2*n-3)*x - 1/R(n-1,x) for n >= 1 with the initial value R(0,x) = Sum_{k >= 0} A112934(k+1)*x^k.at n=33A355721
• Row 2 of table A355721.at n=5A355722