27084

Appears in sequences

• Numbers k such that k*2^k - k - 1 is prime.at n=24A046843
• Numbers k such that phi(sigma(k)+k) = sigma(k-phi(k)), where phi is A000010 and sigma is A000203.at n=35A063710
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.at n=11A148101
• Even dodecagonal numbers: a(n) = 4*n*(5*n - 2).at n=37A193872
• Row sums of the array A274196, defined by g(n,k) = 1 for n >= 0; g(n,k) = 0 if k > n; g(n,k) = g(n-1,k-1) + g(n-1,4k) for n > 0, k > 1.at n=47A274197
• Sum of the asymmetry degrees of all compositions of n with parts in {3,4,5,6, ...}.at n=29A276059
• G.f.: Sum_{n=-oo..+oo} Fibonacci(n+1) * x^n * (1-x^n)^n.at n=22A292498
• Number of integer partitions of n with all distinct lengths of maximal gapless runs (decreasing by 0 or 1).at n=42A384884