23640

Appears in sequences

• Generalized Fibonacci numbers.at n=8A006604
• a(n) = ceiling((n + 7/10)^3).at n=27A034133
• a(n) in base 14 is a repdigit.at n=47A048338
• Numbers k > 1 such that, in base 6, k and k^2 contain the same digits in the same proportion.at n=11A061660
• a(n) = n*(n+1)*(n^2-2*n+2)/2.at n=15A101375
• Numbers n such that 9*10^n-7 is prime.at n=23A103092
• G.f. satisfies A(x) = 1 + x*(1 + x*A(x)^3)^4.at n=7A137958
• Number of odd squarefree semiprimes (A046388) < 2^n.at n=16A146168
• Smallest number k such that k^n is the sum of numbers in a twin prime pair.at n=48A195336
• Number of distinct proper angles that can be formed by a vertex and two leg endpoints on grid points in an n X n square grid.at n=19A252591
• Number of n X n 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.at n=3A278378
• Number of nX4 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.at n=3A278381
• T(n,k)=Number of nXk 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.at n=24A278385
• Number of (binary) max-heaps on n elements from the set {0,1} containing exactly six 0's.at n=29A326507
• Indices of unique values in A329152.at n=27A333268
• Number of collinear triples in a 4 X n rectangular grid.at n=32A334706
• Numbers k such that A348215(k) = k.at n=38A348216