25169

Properties

Appears in sequences

• Number of partitions with no even part repeated; partitions of n in which no parts are multiples of 4.at n=45A001935
• Primes p such that x^48 = 2 has no solution mod p, but x^24 = 2 has a solution mod p.at n=29A059669
• n is prime and is the concatenation of numbers n_1, n_2, n_3, in that order, with n_1 - n_2 = n_3. (Do not allow leading zeros for nonzero n_i.)at n=25A067861
• Number of partitions of 2n+1 in which no parts are multiples of 4.at n=22A081056
• Balanced primes of order four.at n=29A082079
• Let n range through the odd numbers skipping multiples of 5; a(n) = n-th prime ending in n.at n=27A089779
• Primes which are the reverse concatenation of three consecutive square numbers.at n=1A104302
• Primes p, with index k, such that p-k and p+k are both prime.at n=33A143794
• Smaller of 3 consecutive prime numbers such that p1*p2*p3+d1+d2-1=average of twin prime pairs, d1(delta)=p2-p1,d2(delta)=p3-p2.at n=9A153402
• a(n) = 52*n^2 + 1.at n=22A158644
• Number of (n+1) X (n+1) 0..3 symmetric matrices with every 2 X 2 subblock having two or three distinct values, and new values 0..3 introduced in lower triangle row major order.at n=2A210831
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^2>x^2+y^2.at n=37A211810
• Least prime of the form x^2+13*n^2.at n=43A248409
• Subtract 1 from the terms of A256407.at n=42A256410
• Expansion of phi(-x^6)^2 / (chi(x) * phi(-x)^2) in powers of x where phi(), chi() are Ramanujan theta functions.at n=15A260545
• Primes 10k + 9 at the end of the maximal gaps in A269261.at n=7A269263
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 430", based on the 5-celled von Neumann neighborhood.at n=39A272116
• Number of nX4 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=6A317892
• Number of n X 7 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=3A317895
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=48A317896