37851

Appears in sequences

• Number of ways of arranging 2n+1 nonattacking semi-queens on a (2n+1) X (2n+1) toroidal board.at n=5A006717
• a(n) = Sum_{j=1..n} j*prime(j).at n=30A014285
• Expansion of g.f. 1/((1-4*x)*(1-7*x)).at n=5A016150
• 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, -1, 1), (-1, 0, -1), (0, -1, 0), (1, 1, 0)}.at n=10A149083
• a(n) is the n-th J_7-prime (Josephus_7 prime).at n=12A163787
• Number of 4-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero.at n=29A208598
• Numbers n such that phi(n) = phi(n+12) and n is not divisible by 2.at n=39A217141
• Least k such that the sum of the semiprime divisors equals n times the sum of the prime divisors, or 0 if no such k exists.at n=24A227419
• Number of length-(n+1) 0..5 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.at n=8A268324
• Numerator of the barycenter of first n primes defined as a(n) = numerator(Sum_{i=1..n} (i*prime(i)) / Sum_{i=1..n} prime(i)).at n=30A306834
• Number of transversals in a cyclic diagonal Latin square of order 2n+1.at n=5A348212
• Expansion of Sum_{k>0} x^(4*k)/(1-x^k)^5.at n=31A363608
• Expansion of Sum_{k>0} x^(4*k)/(1+x^k)^5.at n=31A363618
• Tetraprimes (or products of exactly four distinct prime numbers) that are the sum of two successive tetraprimes.at n=15A380348