40050

Appears in sequences

• Revert transform of ((x - 1)(3x - 1))/(1 - 3x + x^3).at n=9A049126
• House numbers (version 2): a(n) = (n+1)^3 + (n+1)*Sum_{i=0..n} i.at n=29A050509
• Disk domain wall degeneracies for brane I in the O(K) -> P^1 X P^1 geometry.at n=1A061627
• Least of four consecutive numbers which are cubefree and not squarefree, i.e., numbers k such that {k, k+1, k+2, k+3} are in A067259.at n=21A071320
• Numbers n divisible by exactly two nontrivial permutations (rearrangements) of the digits of n.at n=33A090057
• Numbers n such that n*(n+1)/2 is the juxtaposition of two identical strings in binary representation.at n=38A092739
• a(n) = 64*n^2 + 2*n.at n=25A158070
• Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having a sum of two or less, with rows and columns of the latter in lexicographically nondecreasing order.at n=28A227259
• Least positive integer k such that prime(k)-k, prime(k)+k, prime(k*n)-k*n, prime(k*n)+k*n, prime(k)+k*n and prime(k*n)+k are all prime.at n=16A259492