29052

Appears in sequences

• Numbers k such that sopf(k) = sopf(k+2), where sopf(k) = A008472(k).at n=23A063968
• Structured disdyakis triacontahedral numbers (vertex structure 7).at n=11A100159
• Numbers n such that 2*10^n + 7*R_n - 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=12A102958
• a(n) = n*(4*n^2+5*n-3)/2.at n=23A126335
• 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, 1), (-1, 1, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.at n=9A148497
• a(n) = Sum_{i=0..n} digsum_9(i)^3, where digsum_9(i) = A053830(i).at n=59A231686
• Number of factorizations of m^n into exactly four factors, where m is a product of two distinct primes.at n=15A277240
• Number of ways to write n as an ordered sum of 9 squarefree numbers.at n=11A341069
• a(n) = n * Sum_{d|n} binomial(d+3,4)/d.at n=26A343545