174420

Appears in sequences

• a(n) = 2*(n+1)*binomial(n+3,4).at n=16A027789
• a(n) = (n+1)*binomial(n+5, 5).at n=14A027810
• Expansion of (1+x^2*C)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=10A071718
• a(n) = n*(n+1)*(n+2)*(n+3)*(n+4)/8.at n=15A151974
• a(1)=1. For n>1, a(n) equals the smallest number > a(n-1) of the form a(k) U j U a(k) U j, where U represents concatenation (written in decimal) of the binary representation of the arguments, where 1<=k < n, and j = {0} or {1} or {}.at n=20A175336
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+161)^2 = y^2.at n=38A206426
• Expansion of e.g.f. 1 / ( 1 - Sum_{k>=0} x^(3*k+5) / (3*k+5)! ).at n=19A365916