30620

Appears in sequences

• a(0) = 1, a(n) = 42*n^2 + 2 for n>0.at n=27A010023
• Numbers n such that 215*2^n-1 is prime.at n=27A050859
• a(n) = 25*n^2 - 5.at n=34A158446
• Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order.at n=5A227124
• T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order.at n=49A227125
• T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order.at n=50A227125
• Number of length n+5 0..2 arrays with no disjoint triples in any consecutive six terms having the same sum.at n=7A247989
• a(n) = (-3*(-1)^n + Sum_{k>=0} A000108(k)*k^n/6^k)/sqrt(3), where A000108 are Catalan numbers.at n=7A260701
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 974", based on the 5-celled von Neumann neighborhood.at n=39A273853
• a(n) = 1*2*3 - 4*5*6 + 7*8*9 - 10*11*12 + 13*14*15 - ... + (up to n).at n=39A319543
• Complement of A340745.at n=10A340824