27813

Appears in sequences

• Numbers k such that 263*2^k+1 is prime.at n=5A032508
• a(n) is the number of times that sums 1+-4+-9+-16+-...+-n^2 of the first n squares is zero. There are 2^(n-1) choices for the sign patterns.at n=26A083527
• Number of n X 4 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nonincreasing.at n=36A266543
• Numbers k such that (26*10^k - 167)/3 is prime.at n=19A294678
• Number of ways of partitioning the set of the first n positive squares into two subsets whose sums differ at most by 1.at n=27A307877
• Numbers that are the sum of eight fourth powers in exactly ten ways.at n=27A345842