26487

Appears in sequences

• Numbers k such that k divides s(k), where s(1)=1, s(j)= s(j-1) + j*7^(j-1).at n=32A014948
• a(n) = n^2*(n^2+3)/4.at n=17A039623
• Numbers k that divide 5^k + 4^k.at n=41A045590
• Numbers with multiplicative persistence value 6.at n=34A046515
• Number of isomorphism classes of associative non-commutative non-anti-associative non-anti-commutative closed binary operations on a set of order n.at n=6A079241
• L-th order palindromes with L > 2.at n=22A089381
• a(n) = A007290(n+2) - 1 = 2*C(n+2,3) - 1.at n=42A108766
• Number of permutations of length n which avoid the patterns 1234, 1243, 3421.at n=12A116762
• 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, 0, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1), (1, 1, -1)}.at n=10A148358
• Composite numbers whose multiplicative persistence is 6.at n=32A199996
• G.f.: A(x) = Sum_{n>=0} x^(n*(n+1)/2) / Product_{k=1..n} (1-x^k)^k.at n=33A206138
• List of base-ten k-balanced factorization integers: The combined digits of an integer and its factorization primes and exponents contain exactly k copies of each of the ten digits, for some k.at n=0A273260
• L.g.f.: log( Product_{n>=1} 1/(1 - (2^n+1)*x^n) ).at n=9A322209
• Numbers k such that k and k+1 are products of at least 6 primes.at n=39A346207
• Terms of A046337 for which A358777 is zero, where the latter is the Dirichlet inverse of former's characteristic function.at n=40A359607
• Numbers k that divide the k-th central Delannoy number.at n=39A372901
• Number of integer partitions of n such that the least part plus the greatest part is odd.at n=41A390092