40700

Appears in sequences

• Numbers n such that 39*2^n-1 is a prime.at n=17A050545
• Constant term of the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=20A192757
• a(n) = n*(2*(n - 2)*n + (-1)^n + 3)/4.at n=44A323724
• For any k, the cumulative sum a(1) + a(2) + a(3) + ... + a(k) shares at least five digits with a(k). Lexicographically first sequence of positive integers without duplicate terms having this property.at n=27A326640
• Triangle read by rows: T(n,k) is the number of noncrossing caterpillars with n edges and diameter k, 0 <= k <= n.at n=50A361357