25101

Appears in sequences

• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^9 in powers of x.at n=34A001487
• a(n) = Sum_{i=1..n} LookAndSay(i).at n=32A079664
• 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, 0), (-1, 0, 1), (-1, 1, -1), (1, 0, -1), (1, 0, 1)}.at n=9A149147
• Number of partitions p = [x(1), ..., x(k)], where x(1) >= x(2) >= ... >= x(k), of n such that max(x(i) - x(i-1)) >= number of distinct parts of p.at n=41A241821
• Index sequence for limit-block extending A000002 (Kolakoski sequence) with first term as initial block.at n=43A246145
• Partial sums of primes of form n^2 + (n+1)^2 + (n+2)^2 (A027864).at n=8A248373
• Integers k such that (2^k + 1) + (3^k + 1) + (5^k + 1) is prime.at n=17A268064
• Terms k of A228058 such that gcd(k - A048250(k), A162296(k) - k) = A162296(k) - k.at n=36A325376
• Odd composites k such that sigma(k) has the same powerful part as k, where sigma is the sum of divisors function.at n=21A386425