30705

Appears in sequences

• Denominators of cosecant numbers: -2*(2^(2*n-1)-1)*Bernoulli(2*n).at n=44A001897
• Divisors of 2^44 - 1.at n=29A003549
• Weighted count of partitions with distinct parts.at n=42A005895
• Terms of A050530 with four prime divisors.at n=17A053340
• Fifth column of triangle A055252.at n=8A055581
• Numbers k such that 4*k-1, 8*k-1, 16*k-1 and 32*k-1 are all primes.at n=19A101794
• Triangle read by rows: T(n,k) = is the number of directed column-convex polyominoes of area n having along the lower contour exactly k reentrant corners, i.e., a vertical step that is followed by a horizontal step (n >= 1, k >= 0).at n=44A121466
• Numbers n for which 2n-1, 4n-1, 8n-1, 16n-1 and 32n-1 are primes.at n=4A124017
• Numbers k for which 2*k-1, 4*k-1, 8*k-1 and 16*k-1 are primes.at n=27A124494
• The non-repetitive Kaprekar binary numbers in decimal.at n=39A163205
• -7-Knödel numbers.at n=24A225511
• a(n) = a(n-1) + 3*a(n-2) - 2*a(n-3) - 2*a(n-4), where a(0) = 1, a(1) = 2, a(2) = 3, a(3) = 4.at n=23A295619