39991

Appears in sequences

• a(n) = (1 - (-6)^n)/7.at n=6A014987
• Triangle of q-binomial coefficients for q=-6.at n=29A015116
• Triangle of q-binomial coefficients for q=-6.at n=34A015116
• Gaussian binomial coefficient [ n,6 ] for q = -6.at n=1A015328
• a(n) = 5*a(n-1) + 6*a(n-2), a(0) = 0, a(1) = 1.at n=7A015540
• Numbers k such that k | 6^k + 1.at n=13A015953
• Cyclotomic polynomials at x=6.at n=14A019324
• Cyclotomic polynomials at x=-6.at n=7A020505
• Number of symmetric n X 3 crossword puzzle grids.at n=12A034185
• a(n) = n^6 - n^5 + n^4 - n^3 + n^2 - n + 1.at n=6A060888
• Value of n-th cyclotomic polynomial at phi(n).at n=13A070524
• Smallest k > 0 such that nk-1 is an n-th power, or 0 if no such number exists.at n=6A076951
• a(n) = Sum_{k=0..n} (-1)^(n-k)*n^k.at n=6A081209
• Numbers k such that 8*10^k + 6*R_k + 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=15A103088
• Numbers k such that k^3 divides 6^(k^2) + 1.at n=5A128680
• a(n) = ceiling(6^n/n).at n=6A129790
• Numbers k such that 3^k + 22 is prime.at n=24A219042
• Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.at n=9A222680
• Numbers k such that k^2 divides 6^k + 1.at n=5A292332
• a(n) = (n-1)*(n-2)*(n^2+9*n+12)/24.at n=30A323847