70980
domain: N
Appears in sequences
- Numbers j such that j and 2j are both between a pair of twin primes.at n=20A066388
- Triangle read by rows: T(n,k) is the number of noncrossing connected graphs on n nodes on a circle, having exactly k four-sided faces, n>=2, 0<=k<=floor(n/2)-1.at n=34A094046
- Period of the decimal representation of 1/Fibonacci(n).at n=32A175561
- Numbers m such that exactly four subsets of {m-1, m, m+1} sum up to a prime number.at n=23A221310
- Integer areas of integer-sided triangles such that the length of two sides are Fibonacci numbers.at n=18A236539
- Values of k such that k^2 + (k+3)^2 is a square.at n=6A241976
- Number of (n+2) X (4+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.at n=7A261109
- Row sums of triangle A303990.at n=3A303991
- Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=0..n} k^j * j^k.at n=40A368486
- Triangle T(n,k) (1 <= k <= n) read by rows: T(n,k) = c_n * F(k)/F(k+2) where c_n = LCM of F(3), F(4), ... F(n+2) (and F() are the Fibonacci numbers).at n=27A374667