24357

Appears in sequences

• Apply partial sum operator 4 times to binary rooted tree numbers.at n=13A014171
• Number of partitions satisfying cn(2,5) + cn(3,5) < cn(0,5) + cn(1,5) + cn(4,5).at n=39A039869
• Split positive integers into extending even groups and sum: 1+2, 3+4+5+6, 7+8+9+10+11+12, 13+14+15+16+17+18+19+20, ...at n=23A061317
• Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 2 which is flat, i.e., with all blocks in parallel position and symmetric after a rotation by 180 degrees.at n=14A123765
• Number of 1..29 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1.at n=2A171303
• Number of 1..n integer arrays v[1..3] of length 3 with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..2.at n=28A171340
• Triangle read by rows: T(n,k) is the number of up-down permutations of {1,2,...,n} having genus k (see first comment for definition of genus).at n=48A178516
• Sum of all parts > 1 of all partitions of n.at n=22A194552
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2<x^2+y^2.at n=32A211635
• Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 n X 2 array.at n=22A219621
• Expansion of Product_{k>=1} (1 - x^(8*(2*k-1))) * (1 - x^(8*k)) / (1 - x^k).at n=41A280938
• Sum of the next n positive integers repeated (A008619).at n=45A319006
• a(n) is the index of the smallest n-gonal number with binary weight n.at n=24A359091