30390

Appears in sequences

• a(n) = 60*n^2 + 180*n + 150.at n=20A069477
• Third differences of fifth powers (A000584).at n=23A101096
• Numbers k such that 2*k-1, 4*k-1, 6*k-1 and 8*k-1 are primes.at n=20A124487
• p(p(2^n)-p(n+1)+p(n*2)-p(n^2))-1, where p(n)=n-th prime.at n=8A141084
• Number of 0..n arrays x(0..5) of 6 elements with each no smaller than the sum of its two previous neighbors modulo (n+1).at n=7A207103
• Number of length 2+2 0..n arrays with some pair in every consecutive three terms totalling exactly n.at n=28A245871
• Squarefree numbers n such that n^2 + 1 and n^2 - 1 are semiprime.at n=33A268697
• a(n) is the number of integer partitions of n for which the largest part is equal to the index of the seaweed algebra formed by the integer partition paired with its weight.at n=59A318203
• Sum of the smallest parts of all compositions of n into distinct parts.at n=28A336902
• Expansion of 1/(1 - 9*x/(1 + x))^(1/3).at n=6A361881
• a(n) = Sum_{k=0..n} (-1)^k * binomial(n+k+2,n-k) * Fibonacci(k+1).at n=14A390853