38976

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFG = Afghanite (Na2,Ca,K2)12[Al24Si24O96] starting with a T3 atom.at n=6A018954
• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite CAN = Cancrinite Na6[ Al6Si6O24 ] . CaCO3 . 2 H2O.at n=6A018997
• Numbers k such that k | sigma_3(k) - phi(k)^3.at n=21A055697
• a(0)=a(1)=1. a(n) = the multiple of n which is >= a(n-1)+a(n-2) and is < a(n-1)+a(n-2)+n.at n=21A128035
• Rectangular table, read by antidiagonals, where the g.f. of row n, R(x,n), satisfies: R(x,n) = 1 + (n+1)*x*R(x,n+1)^2 for n>=0.at n=49A128570
• Row 5 of table A128570.at n=4A128575
• Sum of staircase twin primes according to the rule: top * bottom - next top.at n=14A135285
• Number of ways to place 2 queens on an n X n chessboard so that they attack each other.at n=28A144945
• Numbers with prime factorization pqrs^6.at n=19A190292
• Number of permutations of [n] avoiding the consecutive pattern 45321.at n=8A202213
• Number of permutations avoiding the consecutive pattern 34521.at n=7A202216
• Number of permutations avoiding the consecutive pattern 45132.at n=7A202217
• Number of permutations avoiding the consecutive pattern 41523.at n=7A202221
• Number of permutations avoiding the consecutive pattern 23451.at n=7A202222
• The hyper-Wiener index of the linear phenylene with n hexagons.at n=6A224455
• Number of integers k^6 that divide 1!*2!*3!*...*n!.at n=19A248824
• Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive pattern 45321; triangle T(n,k), n >= 0, 0 <= k <= max(0, floor((n-1)/4)), read by rows.at n=11A264781
• a(n) is the number of I^n-symmetric chains that are not I^k-symmetric for any k dividing n.at n=11A324919
• Number T(m,n) of permutations of [n] avoiding the consecutive pattern 12...(m+1)(m+3)(m+2), where m, n >= 0; array read by ascending antidiagonals.at n=63A327722
• Triangle read by rows: T(n,m) = Sum_{i=1..n} C(n,i-m)*C(n+m-i,i-1)*C(n+m-i,m)/n, with T(0,0)=1.at n=59A337991