27048

Appears in sequences

• Number of compositions of n into 7 ordered relatively prime parts.at n=13A023032
• a(n) = Sum_{i=1..floor((n+2)/4)} a(2i-1)*a(n-2i+1), with a(1)=2, a(2)=1, and a(3)=3.at n=12A024961
• Triangular array formed by the little Schröder numbers s(n,k).at n=39A110440
• Difference between the product of two consecutive primes and the next prime.at n=37A111071
• Numbers n such that (n+j)^3-(n+j)^2+1 are primes for j=0 to 3.at n=4A111502
• a(n) = n*(2*n^2 + 5*n + 3).at n=23A163815
• Number of (n+1)X(n+1) 0..3 symmetric matrices containing all values 0..3 with every 2X2 subblock having two or four distinct values, and new values 0..3 introduced in lower triangle row major order.at n=3A210820
• Area A of the cyclic quadrilaterals PQRS with PQ>=QR>=RS>=SP, such that A, the sides, the radius of the circumcircle and the two diagonals are integers.at n=39A219225
• Second convolution of A065096.at n=7A238755
• Number T(n,k) of Dyck paths of semilength n having exactly k (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)); triangle T(n,k), n>=0, 0<=k<=max(0,floor(n/2)-1), read by rows.at n=47A243366
• Number of Dyck paths of semilength n having exactly 3 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).at n=6A243415
• Indices of primes followed by a gap (distance to next larger prime) of 44.at n=38A320720
• G.f. = (3*x^4+5*x^2+6*x-7)/(4*x^7+x^4+x^2+x-1).at n=17A362923