22354

Appears in sequences

• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (odd natural numbers), t = A000201 (lower Wythoff sequence).at n=42A024599
• Sin(n) decreases monotonically to -1.at n=36A046964
• a(0)=1; a(n) is the smallest integer > a(n-1) such that sin(a(n)) is closer to an integer (here 0 or -1) than sin(a(n-1)).at n=35A079037
• Number of primitive Pythagorean-like triples a^2+b^2=c^2+k for k=-5 with 0<c<=10^n.at n=4A121087
• a(1) = 1, and for each n >=2, a(n) is the smallest number such that 1/cos(a(n)) < 1/cos(k) for all k < n, so that 1/cos(a(1)) > 1/cos(a(2)) > ... > 1/cos(a(n)) > ...at n=35A172448
• a(n) = Sum_{k=1..n} 2^nonprime(k).at n=7A176496
• a(n) = 2*n^3 - 4*n^2 + 6*n - 2 (n>=1).at n=22A304159
• a(n) = A348507(A276086(n)), where A348507(n) = A003959(n) - n, A003959 is multiplicative with a(p^e) = (p+1)^e, and A276086 gives the prime product form of primorial base expansion of n.at n=55A348950
• a(n) = n! * Sum_{k=1..n} (-1)^(n-k) * Stirling1(n,k) * H(k), where H(k) is the k-th harmonic number.at n=5A354685