22450

Appears in sequences

• Numbers k in which the digits of k^2 appear.at n=31A029774
• Numbers k such that k and k^2 have the same set of digits.at n=14A029793
• Numbers k such that (k!! + (k+1)!! - 1)/2 is prime.at n=18A076209
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 5.at n=42A136882
• Numbers k such that k and k^2 use only the digits 0, 2, 4 and 5.at n=28A136897
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 5 and 6.at n=53A136898
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 5 and 7.at n=40A136899
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 5 and 8.at n=50A136900
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 5 and 9.at n=43A136901
• a(n) = 36*n^2 - 2*n.at n=24A158062
• Expansion of Product_{k>=1} 1/((1 - x^(2*k-1))^(k*(3*k-1)/2)*(1 - x^(2*k))^(k*(3*k+1)/2)).at n=14A294591
• a(n) = (8*n^3 + 15*n^2 + 13*n)/6.at n=25A332698
• Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 + x * cosh(x))^2 ).at n=5A381449