25862

Appears in sequences

• Numbers k such that the k-th triangular number contains only digits {3,4,5}.at n=9A119183
• Number of base 18 circular n-digit numbers with adjacent digits differing by 7 or less.at n=4A125430
• a(n) = (9^n - (-7)^n)/(9 - (-7)).at n=5A160958
• Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=17A192970
• Expansion of (Product_{k>0} theta_3(q^k)/theta_4(q^k))^(1/2), where theta_3() and theta_4() are the Jacobi theta functions.at n=19A320968