973078528

Appears in sequences

• Denominators of Taylor series expansion of arcsin(x). Also arises from arccos(x), arccsc(x), arcsec(x), arcsinh(x).at n=14A002595
• a(n) = 2^n*(binomial(n,2) + 1).at n=22A052481
• a(n) = n*2^(n-4).at n=25A079859
• a(n) is the number of occurrences of 11s in the palindromic compositions of m=2*n-1 = the number of occurrences of 12s in the palindromic compositions of m=2*n.at n=24A079863
• a(0) = a(1) = 1; for n > 1, a(n) = (n+2)*2^(n-2).at n=27A087447
• First differences of A129952.at n=27A129953