51240

Appears in sequences

• Numbers that can be expressed as the difference of the squares of primes in exactly six distinct ways.at n=29A092002
• Coefficient of x^2 in the polynomial (x-p(n))*(x-p(n+1))*(x-p(n+2))*(x-p(n+3)), where p(k) is the k-th prime.at n=22A127348
• Triangle T, read by rows : T(n,k) = A007318(n,k)*A026641(n-k).at n=48A171650
• Number of permutations of 3 copies of 1..n with all adjacent differences <= 2 in absolute value.at n=4A177292
• Number of permutations of n copies of 1..4 with all adjacent differences <= 2 in absolute value.at n=3A177322
• Number of n X 7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 1 vertically.at n=13A208779
• Numbers n such that {largest m such that 1, 2, ..., m divide n} is different from {largest m such that m! divides n^2}.at n=30A232099
• Number of (n+1)X(2+1) 0..3 arrays with every element next to itself plus and minus one within the range 0..3 horizontally, vertically or antidiagonally, with no adjacent elements equal.at n=6A232385
• Number of (n+1)X(7+1) 0..3 arrays with every element next to itself plus and minus one within the range 0..3 horizontally, vertically or antidiagonally, with no adjacent elements equal.at n=1A232390
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every element next to itself plus and minus one within the range 0..3 horizontally, vertically or antidiagonally, with no adjacent elements equal.at n=29A232391
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every element next to itself plus and minus one within the range 0..3 horizontally, vertically or antidiagonally, with no adjacent elements equal.at n=34A232391
• Partial sums of A299291.at n=34A299292
• Sequence lists numbers k > 1 such that k^4 == phi(k) (mod sigma(k)), where phi = A000010 and sigma = A000203.at n=7A324216
• Least k > 1 such that k^n is a twin rank (cf. A002822: 6*k^n +- 1 are twin primes).at n=17A326230
• Primorial deflation of the n-th colossally abundant number: the unique integer k such that A108951(k) = A004490(n).at n=29A342012