31961

Appears in sequences

• "AFK" (ordered, size, unlabeled) transform of 1,2,3,4,...at n=15A032007
• Schoenheim bound L_1(n,n-4,n-5).at n=39A036830
• a(n) is the decimal concatenation of n and n^2.at n=30A053061
• Number of points in N^n of norm <= 2.at n=30A055417
• Composite n such that both n and its reversal in base 10 are squarefree, none of the prime factors of n are palindromes and the prime factors of the reversal of n are the reversals of those of n.at n=9A083526
• Smallest composite number n such that every divisor > 1 includes n as a substring.at n=31A105582
• Expansion of (x+1)*(x^3-x^2-x-1)/((1-x)*(x^2+2*x-1)*(x^2+x+1)).at n=11A108985
• a(1)=2, a(2)=2, a(n)=a(n-2)+floor(a(n-2)*a(n-1)/(a(n-2)+a(n-1))).at n=46A173091
• Number of partitions p of n such that the number of distinct parts is not a part and max(p) - min(p) is not a part.at n=43A241390
• Concatenation of prime(n) and its square.at n=10A271422
• If n^2 has an even number of digits, write n after the left half of the digits of n^2 and before the right half, otherwise if n^2 has 2t+1 digits, write n after the first t digits of n^2 and before the last t+1 digits.at n=18A274620
• Number of permutations p of [n] such that 0p has a nonincreasing up-jump sequence and also has a nonincreasing down-jump sequence.at n=9A288910
• a(n) = [x^n] Product_{j=1..n, k=1..n} (1 + x^(k^j)).at n=13A369578