68800

Appears in sequences

• Structured meta-prism numbers, the n-th number from a structured n-gonal prism number sequence.at n=19A100177
• Numbers k such that (5^p - 3^p)/2 is prime, where p = prime(k).at n=19A123704
• Subset of A020342 (vampire numbers, definition 1) listing numbers which have more than one such representation of the desired form.at n=15A144563
• 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, -1, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.at n=10A148416
• Numbers k such that if k = a*b, then a+b = reversal(k) for some integers a,b > 1.at n=18A161791
• Number of nX2 0..2 arrays with no more than floor(nX2/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order.at n=12A223468
• Sum of the prime parts in the partitions of n into 6 parts.at n=47A309467
• Number of factorizations of n into factors (greater than 1) of n kinds.at n=49A329365
• a(n) = T(n, 3), where T(n, k) = Sum_{i=0..n} i^k * binomial(n, i) * (1/2)^(n-k).at n=40A366151