41820

Appears in sequences

• Define the generalized Pisot sequence T(a(0),a(1)) by: a(n+2) is the greatest integer such that a(n+2)/a(n+1) < a(n+1)/a(n). This is T(3,5).at n=31A018917
• Expansion of Product_{m>=1} (1+q^m)^30.at n=4A022594
• a(n) = Sum_{k=0..n} binomial(n,k) * binomial(Fibonacci(k)+1,2).at n=10A033190
• McKay-Thompson series of class 21A for Monster.at n=28A058563
• Numbers n such that 54 'Reverse and Add' steps are needed to reach a palindrome.at n=13A065321
• Long leg of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse.at n=31A089548
• a(n)= sum_{i=7..n+6} A000931(i).at n=32A167385
• Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 2 X n array.at n=14A219940
• Column k=10 of triangle A257673.at n=4A321955
• Expansion of (1 - x^4 - x^5)/((1 - x^4 - x^5)^2 - 4*x^9).at n=43A376731
• Primitive terms of A388036.at n=42A388037
• First component A of the pairs (A, B), listed in increasing order, such that the multiset of digits of A union the multiset of digits of B equals the multiset of digits of A^2 and the multiset of digits of B^2, for some B >= A. Note that terms may be repeated.at n=9A389379