25424

Appears in sequences

• Absolute value of Glaisher's alpha(n).at n=28A002290
• Coordination sequence for D_8 lattice.at n=3A008361
• Square of lower triangular matrix of A056857 (successive equalities in set partitions of n).at n=39A078937
• Square array T(n,k) read by antidiagonals: coordination sequence for lattice D_n.at n=31A103903
• Difference between the product of two consecutive primes and the next prime.at n=36A111071
• Fourth column of PE^2.at n=8A129325
• G.f.: Product_{k>0} (1 - x^k)^4 * (1 - (-x)^k)^8.at n=28A225543
• a(n), n>1, is the smallest number k whose symmetric representation of sigma(k) has two parts and has a larger number of legs in its two parts than a(n-1); a(1)=3.at n=31A279105
• Number x = concat(MSD(x),b) such that MSD(x)*b = phi(x), where MSD(x) is the Most Significant Digit of x and phi(x) is the Euler totient function of x.at n=28A286130
• Number of ways to write n as an ordered sum of 8 nonzero triangular numbers.at n=45A340953
• Expansion of e.g.f. 1/(1 - x/2 * (exp(2 * x) - 1)).at n=7A354313